### Bug fixes

• Fix ParametricJob$cases() when multiple objects are specified on the LHS in ParametricJob$param() (#492).
• Fix install_eplus(9.1) on Linux (#494, #495).
• Now ParametricJob$run() can correctly use weather file when only one parametric model exists (#497). ### Minor changes • Compatibility changes for incoming {units} v0.8 (#499). ### New features • Idd$path() is added to show the path of IDD parsed (#442).

• Add epw data sources from climate.onebuilding.org for download_weather(). type will always be "all" for those sources (#453).

• Add a new "stat" option in type in download_weather() (#453).

• Idf$is_valid_id() and Idf$is_valid_name() gain a new argument named class defaulting to NULL to check the validity of object IDs and names again a specific class.

• Add support for EnergyPlus v9.5 (#438).

• Add support for EnergyPlus v9.6 (#460).

• Internal function locate_eplus() has been exported to enable user to find all available EnergyPlus without restarting R (#477).

• uninstall_eplus() has been added to enable uninstall EnergyPlus from R on all platform (#477).

• Now force re-installation of EnergyPlus install_eplus(force = TRUE) has been updated to support all platforms, including macOS (#477).

• install_eplus() has been updated to behave smarter on macOS (#477).

• run_idf() and run_multi() have been refactored to mimick the Epl-run.bat procedure. It supports to call the Basement and Slab processors. Now the requirement of EnergyPlus >=v8.3 for running simulations has been droppped Now simulations with FMU, including obFMU are supported. (#467).

• HVAC-Diagram will be called when running simulations to make sure the svg output of HVAC diagram can be generated. Therefore, hvac_diagram() has been deprecated and will be removed in next major version (#467).

• Functions path_eplus() and path_eplus_*() have been added to help specify file paths under EnergyPlus installation directory (#467).

• A new Idf method $external_deps() is added to extra any external file resources specified in the IDF that are needed for simulation, e.g. schedule files (#467). • Now Idf$save(external = TRUE) and Idf$run(copy_external) save external file dependencies based on the results of Idf$external_deps() (#467).

• A new EplusJob method $list_files() is added to list all inputs and output files for current simulation (#467). • A new argument readvars can be specified in EplusJob$run() and EplusGroupJob$run(). Setting it to FALSE will disable to run ReadVarsESO post-processor and thus no CSVs will be generated for Report variables and meters. This can speed up simulations significantly if there are hundreds of outputs in the model. Setting it to FALSE will not affect any data extraction functionalities in eplusr, as it uses the SQLite output instead of the CSVs (#467). • Now .() can also be used as an alias as list() in Idf$add() and Idf$set() (#445).  idf$add(Output_Variable = .("*", "zone mean air temperature"))
# is equivalent to
idf$add(Output_Variable = list("*", "zone mean air temperature")) • A new argument names can be specified in ParametricJob$models() to rename the parametric models created (#487).

• A new interface for creating parametric models has been introduced using ParametricJob$param(). It takes parameter definitions in list format, which is similar to Idf$set() except that each field is not assigned with a single value, but a vector of any length, indicating the levels of each parameter. For example, the code block below defines 3 parameters (#487):

• Field Fan Total Efficiency in object named Supply Fan 1 in class Fan:VariableVolume class, with 10 levels being 0.1 to 1.0 with a 0.1 step.
• Field Thickness in all objects in class Material, with 10 levels being 0.01 to 0.1 m with a 0.1 m step.
• Field Conductivity in all objects in class Material, with 10 levels being 0.1 to 1.0 W/m-K with a 0.1 W/m-K step.
param$param( Supply Fan 1 = list(Fan_Total_Efficiency = seq(0.1, 1.0, 0.1)), Material := list(Thickness = seq(0.01, 0.1, 0.1), Conductivity = seq(0.1, 1.0, 0.1)) ) • ParametricJob$cases() is added to get a summary of parametric models and parameter values. It returns a data.table giving you the indices and names of the parametric models, and all parameter values used to create those models.For parametric models created using ParametricJob$param(), the column names will be the same as what you specified in .names. For the case of ParametricJob$apply_measure(), this will be the argument names of the measure functions (#487).

• Better error message when no arguments are given to the measure function in ParametricJob$apply_measure() (#487). ### Bug fixes • Fix the year value calculation when first day of a run period is holiday (#450). • Fix download_weather() file downloading URL (#452). • Fix EplusSql$report_data(..., wide = TRUE) when Do HVAC Sizing Simulation for Sizing Periods is set to Yes in SimulationControl (#461).
• Now read_idf() and other functions that read files from disk can use stringi::stri_enc_detect() to fix encoding issue (#467).
• Now ParametricJob$run(dir = NULL) will always use the seed model directory (#483). ### New features • IddObject$output() is added to extract all possible outputs of current class. All outputs are extracted from the LaTeX source file of “Input Output Reference” for EnergyPlus v9.5.0 and later. So empty result will always be returned for Idd version lower than v9.5. It is possible that there are some mistakes introduced when extracting the output variables. Also, some outputs are only available if certain fields are set. Even they are listed in the results, it does not mean that the Idf can report all of them. It is strongly suggested to check the RDD and MDD file for correctness (#427). Example:


idd <- use_idd(8.8)
idd$Lights$outputs()

### Break changes

• Autocompletion is enabled by registering a S3 .DollarNames method. Option autocomplete is deprecated. A warning is issued if you try to set it in eplusr_option(). Also, with_speed() is deprecated and falls back to without_checking() when called (#417).

### Bug fixes

• Fixed wrong transition of FuelFactors from v9.2 to v9.3 (#420).
• Fixed Idf$del error when both sources and referees are given (#433). • Fixed the error that EplusGroupJob$tabular_data(..., wide = TRUE) did not return the index column (#449).

### Minor changes

• Better error and verbose messages (#422, #423).
• The default mouse mode for wheel has been changed to "pull".

### New features

• Epw$save() gets a new option format_digit. If TRUE, the trailing digits in EPW data will be formatted in the same way as Weather Converter (#323). • Add EnergyPlus v9.3 and v9.4 support (#343, #347, #369). • Now ParametricJob$apply_measure() will give a nice progress bar when parametric models are creating (#378).
• A new argument separate is added in EplusGroupJob$run() and ParametricJob$run() with default value being TRUE. If set to FALSE, all models are saved in dir when simulation, instead of creating a folder for each model and running simulation there (#381).
• When extracting grouped simulation results using $report_data_dict(), $report_data() and etc in EplusGroupJob and ParametricJob class, a new column index is added which contains the indices of simulated models (#388). This is because when the same model runs with different weather files, the original case column cannot be used as an identifier.

### Major changes

• Now eplusr will always use the SQLite output for data extraction instead of using the CSV output. In EnergyPlus v9.3 and above, ReadVarsESO is deprecated and EnergyPlus itself will generate CSV directly. CSVs for variables and meters are always separated in this way. Together with the newly introduced Output:Control:Files which can be set to disable CSV output, it becomes very cumbersome to continuously support the CSV for data extraction (#307).

### Minor changes

• Now rgl and decido package has been moved from Imports to Suggests, since they are only used in the IdfViewer class for 3D visualization which is not the main focus of this package (368).
• run_multi() now gets a new argument expand_obj to control whether ExpandObjects should be called before simulation or not. Because there is a known issue of ExpandObjects on Linux system (https://github.com/NREL/EnergyPlus/issues/8376), here we want to avoid unnecessary calls of ExpandObjects as possible. Also, EplusJob$run() and EplusGroupJob$run() now will detect if there are any HVACTemplate:* objects and set the expand_obj flag properly (#377).

### Bug fixes

• When .empty is FALSE, Idf$set() and Idf$update() will keep fields if there are not the last fields (#310).
• Year fields are correctly calculated for EnergyPlus v9.1 and above (#312).
• Fix coordinate system alignment in IdfGeometry class (#314).
• Fix time matching in EplusSql$report_data() (#315). • EPW COMMENT1 and COMMENT2 are now parsed as a single string (#318). • Preserve input year values in Epw$set() (#322).
• Additional columns in Epw$set() and Epw$add() input are now removed (#320).
• Now Epw$abnormal_data() can keep columns that contains abnormal data when keep_all is FALSE (#326). • Epw$save() now formats the header in the same way as Weather Converter (#328).
• Epw$comment1() and Epw$comment2() now accepts NULL as input, which will remove the comments. And NULL is returned if no comments are found (#330).
• Fix the error when the first field is not in the input in Idf$update() (#332). • Fix the error in EplusJob$report_data() caused by incomplete EnvironmentPeriods table in EnergyPlus SQL output (#336).
• Make sure Day of Week for Start Day is reset to empty if UseWeatherFile was used in transition from v8.9 to v9.0 (#338).
• Fix the error in EplusJob$report_data() when multiple reporting frequencies exist in the CSV output (#340). • Fix simulation error when FMU files are given in relative paths (#344). Now all objects that reference to external files can be correctly copied into output directory when copy_external is set to TRUE. • Fix the error when using an Idf as input in Idf$insert() (#348).
• Sub-hourly EPW files are supported (#351).
• Fix invalid references introduced by setting field values to empty (#355).
• Fix the error message in EplusGroupJob when no CSV output was found (#357).
• Fix false positive warnings when resolving IDF external file dependencies (#366).
• Empty string input, e.g. " " in Idf$add() and Idf$set() are now correctly converted to NAs (#370).
• Now empty comments are kept in IdfObject$comment() (#372). • Fix IdfGeometry$print() when no building object exists (#395).
• Now IdfGeometry$round_digits() also applies to Zone class (#397). • read_epw() now accepts date rewind in TYPICAL/EXTREME PERIODS header (#401). • Fix c.EpwDate() error (#403). • Fix IdfScheduleCompact$set() evaluate issue when called in nested environment (#405).
• Now IdfScheduleCompact$type_limits() works properly when setting new type limits (#407). ### New features • Idf$add() and Idf$set() have new features:  # refer to field using '..' idf$add(Material = list(..1 = "mat", ..7 = 0.95))
idf$set(mat = list(..6 = 0.5)) # using vector field values idf$add(Material := list(..1 = sprintf("mat%i", 1:10)))
idf$set(c(sprintf("mat%i", 1:10)) := list(..6 = runif(10))) • Idf$to_table() gains a new parameter force. The default value is FALSE. If TRUE, you can convert object data from any classes into a wide data.table. This may be useful when you know that target classes have the exact same fields, e.g. Ceiling:Adiabatic and Floor:Adiabatic (#202).

• A new method Idf$purge() has been added (#223). It can be used to delete any resource objects that are not referenced by other objects. Here resource objects indicate all objects that can be referenced by other objects, e.g. all schedules. $purge() will ignore any inputs that are not resources. If inputs contain objects from multiple classes, references among them are also taken into account, which means purging is performed hierarchically. If both materials and constructions are specified, the latter will be purged first, because it is possible that input constructions reference input materials. Idf$purge() makes it quite straightforward to perform IDF cleaning. Actions like removing all materials, constructions and schedules can be easily achieved via  Idf$purge(class = c("Material", "Construction"), group = "Schedules")
• New methods Idf$duplicatd() and Idf$unique() have been added. They can be used to detect and remove duplicated objects, respectively. Here duplicated objects refer to objects whose field values are the same except the names. Object comments are ignored during comparison. These two methods can be useful when doing model cleaning (#227).

• Now if class is set to NULL in Idf$definition(), the underlying Idd object is returned (#237). • Internal helper functions with_option(), with_silent(), with_verbose(), with_speed() and without_checking() have been exported. They can be used to evaluate an expression with temporary eplusr options (#240). • Now Idf$insert() can directly take an Idf object or a list of Idf objects as input. And also Version objects in input will be directly skipped instead of giving an error (#245).

• A new option all has been added in IdfObject$print() with default being FALSE. If TRUE, all fields defined in [Idd] are printed even they do not exist in current object (#247). • New S3 methods of == for all classes are added, i.e. ==.Idf, ==.IdfObject, ==.Idd, ==.IddObject, ==.Epw, ==.EplusJob, ==.EplusSql, ==.EplusGroupJob, ==.ParametricJob. The negate methods are also added. This makes it quite easy to check the equality of R6 objects of these types (#250). • A new Generic function reload() is added. eplusr relies heavily on the data.table package. The core data of all main classes in eplusr are saved as data.tables. This introduces a problem when loading saved Idf objects or other class objects via an *.RDS and *.RData file on disk: the stored data.tables lose their column over-allocation. reload() is a helper function that calls data.table::setDT() on all internal data.tables to make sure they are initialized properly. It is recommended to call reload() on each Idd, Idf and other class object in eplusr loaded with readRDS() or load(), to make sure all eplusr’s functionaries works properly (#251). • The implementation of EplusSql$report_data() has been refactored, resulting in a ~200% speed-up (#259).

• Now day_type in EplusSql$report_data() has a few new options (#259): • "Weekday": All working days, i.e. from Monday to Friday • "Weekend": Saturday and Sunday • "DesignDay": Equivalent to "SummerDesignDay" plus "WinterDesignDay" • "CustomDay": CustomDay1 and CustomDay2 • "SpecialDay": Equivalent to "DesignDay" plus "CustomDay" • "NormalDay": Equivalent to "Weekday" and "Weekend" plus "Holiday" • Some internal functions have been exported. They are mainly useful for developers to handle internal IDD and IDF data more efficiently (#260). • A new IdfScheduleCompact class is introduced. A constructor function schedule_compact() is added. IdfScheduleCompact class provides more detailed methods to add, modify and extract schedule values. For more details, see vignette("schedule") (#256). • New IdfGeometry and IdfViewer classes are introduced. IdfGeometry is designed to extract data for all geometry objects and perform geometric operations on them, while IdfViewer is to view IDF geoemtry in 3D using the rgl package in a similar way as OpenStudio SketchUp Plugin. Idf$geometry() and Idf$view() methods are added to directly create an IdfGeometry and IdfViewer object based on current Idf object, respectively (#296). • A plot.Idf method is added which is basically a wrapper of Idf$view() (#296).

• Now eplusr can utilize the CSV output for report data extraction. Benefiting from the fantastic data.table::fread, this approach can be as 3~10X faster compared to the SQLite approach. eplusr will still use the SQLite if the CSV output is not available.

### Major changes

• The algorithm of object/field/value relation extraction has been completed refactored. Now it can correctly detect object recursive-reference and it’s faster (#222, #223).

All relation-related methods now have an unified interface:


X$method(which, direction, object = NULL, class = NULL, group = NULL, depth = NULL, keep = FALSE) Where which is a class index or object ID, direction is the target relation direction to extract. All results can be further constrained via 3 extra arguments, i.e. object, class and object. object only applicable to Idf and IdfObject. The depth argument is used to control the depth for searching recursive relations. Default value is 0L, which means no recursive relations will be detected, while NULL means to search all possible recursive relations. A new keep parameter with default value FALSE has been added. If TRUE, all input fields will be returned, even they may not have any relations. This is the default behavior of v0.12.0 and before. In this version, only fields that have relation with other objects will be returned. With this update, it is possible, for example, to directly know the structure of an air loop by using idf$object_relation("AnAirLoop", depth = NULL)

Moreover, a new argument class_ref can be specified in methods of value-relation extraction. It can be used to specify how to handle class-name-references. Class name references refer to references in like field Component 1 Object Type in Branch objects. Their value refers to other many class names of objects, instaed of referring to specific field values. There are 3 options in total, i.e. "none", "both" and "all", with "both" being the default.

• "none": just ignore class-name-references. It is a reasonable option, as for most cases, class-name-references always come along with field value references. Ignoring class-name-references will not impact the most part of the relation structure.
• "both": only include class-name-references if this object also reference field values of the same one. For example, if the value of field Component 1 Object Type is Coil:Heating:Water, only the object that is referenced in the next field Component 1 Name is treated as referenced by Component 1 Object Type. This is the default option.
• "all": include all class-name-references. For example, if the value of field Component 1 Object Type is Coil:Heating:Water, all objects in Coil:Heating:Water will be treated as referenced by that field. This is the most aggressive option.
• read_epw() will proceed parsing for non-standard EPW header format (#236).

• Now EplusSql$report_data() will set the year values of day type SummerDesignDay and WinterDesignDay to current year and the day_type value will be left unchanged (#258). • Now read_idf() will always make sure all necessary fields are added during parsing (#267). • [[.IdfObject now only accept standard field names. No underscore-style names are allowed. • The suffix of automatcially created names in Idf$dup() has been changed from _X to X.

• The warning parameter in read_epw(), Epw$add() and Epw$set() has been deprecated (#298).

### Minor changes

• EplusJob, EplusGroupJob and ParametricJob will not parse input EPW files, but only validate their existences and store the paths (#215)
• period parameter in EplusSql$report_data() now works as expected (#259). • run_idf() and run_multi() now return additional element/column called • version which contain the versions of EnergyPlus that are called during simulations • format.Idd() now returns a single line string in format <EnergyPlus IDD v[Version] (Build) with X classes. • The column datasource returned in Epw$data() has been renamed to data_source.

### Bug fixes

• Fix the bug caused by ExpandObjects executable that causes run_idf fails when running in parallel (#130)
• Idf$insert() now will remove all duplicated objects in input (#219). • Fix the bug in install_eplus() on Windows (#230) • Fix the error in $<-.Idf when input list of IdfObjects are all from the same Idf on the LHS (#238).
• Now Idf$insert() and Idf$load() can now successfully remove duplicated objects by comparing field values case-insensitively (#243)
• Now Epw$save() can work with empty DESIGN CONDITIONS, TYPICAL/EXTREME PERIODS and GROUND TEMPERATURES headers. Thanks @lukas-rokka for the bug report (#263). • Fix output directory creation error in EplusGroupJob(#270). • Fix IDF header option parsing (#278). • Trailing spaces after class names in IDF can be handled correctly (#294). ### New features • Now group_job() supports single IDF input with multiple EPW inputs (#185). • A new method Idf$last_job() has been added to enable getting the last simulation job created using Idf$run() (#187). • Provide a workaround to fix the issue of EnergyPlus v9.1 and above installation which fails to extract files into correct directory /usr/local/EnergyPlus-X-Y-0, but instead extracting all files directly into /usr/local (NREL/EnergyPlus#7256) (#193). • A new parameter group_ext has been added in Idf$to_table() and IdfObject$to_table(), with default value being "none". If "group", values from extensible fields will be grouped by the extensible group they belong to. For example, coordinate values of each vertex in class BuildingSurface:Detailed will be put into a list. If "index", values from extensible fields will be grouped by the extensible field indices they belong to. For example, coordinate values of all x coordinates will be put into a list (#74). ### Bug fixes • The algorithm of detecting numeric columns in EplusSql$tabular_data() has been improved (#190).
• Now EplusSql$tabular_data() keeps the original column order when wide is TRUE (#186). • Fix EnergyPlus installation on macOS (#193). • Fix parallel simulations on macOS (#194). • Now eplus_config() will always return the expanded EnergyPlus path (#196). • Now group_job() will return more informative error messages when input contains Idf objects that havn’t been saved (#204). • Fix error in EplusGroupJob$run() when custom dir is specified (#205).

### New features

• A new method $models() has been added in ParametricJob class. It returns a list of all parametric models generated after a measure has been applied. If no measure is applied, NULL is returned (#59). Thanks @yidan1214 for this feature request. • A new method $save() has been added in ParametricJob class. It saves all generated parametric models and weather file into specified directory. You can use separate argument to determine whether each model is to be saved in a separate folder (#58). Thanks @yidan1214 for this feature request.

• New arguments align and all have been added to to_table() method in Idf class. Setting align to TRUE will make sure that all returned object data per class have the same field number. The number of fields is the same as the object that have the most fields among those you specified. Setting all to TRUE will return all available fields in that class definition in IDD. • Now the weather argument in run() method in Idf class can be set to NULL. If so, design-day-only simulation is performed. Note that this needs at least one Sizing:DesignDay object exists in the Idf object (#80).

• Similar as above, the epw argument in eplus_job() and param_job() can also be NULL to force a design-day-only simulation.

• Now $status() in ParametricJob class includes a new member named job_status which is data.table containing detailed information on each simulation job (#70). • Now $print() in ParametricJob will give you more informative details on each simulation job status, especially when wait is set to FALSE in $run(). • A new column index is added in the returned RddFile and MddFile. It contains index of each variable. • Two new methods $read_rdd() and $read_mdd() have been added in EplusJob class. $read_rdd() and $read_mdd() which parse the simulation RDD and MDD file (#84). • Two new function rdd_to_load() and mdd_to_load() have been added, which format RddFile and MddFile into a data.table in acceptable format for $load() method in Idf class.

• Similar as Output:SQLite, when $run() in Idf object is called, an object in class Output:VariableDictionary is automatically created with Key Field being IDF (#85). • A new argument echo has been added in $run() in Idf, EplusJob and ParametricJob class. It is only applicable when wait is TRUE. If FALSE, the simulation will be run silently without echoing any message from EnergyPlus.

• A new function transition() has been added. Basically it is an R implementation of IDFVersionUpdater. Currently the lowest version of IDF is v7.2. It should be much faster than IDFVersionUpdater.

• Now the way of find IDD file has been changed to take advantage of IDD files distributed along with IDFVersionUpdater. This update makes it possible to directly read IDF of most versions without downloading corresponding IDD.

• A new option autocomplete with default value being interactive() has been added. It is used to control whether to turn on autocompletion on class and field names. Underneath, makeActiveBinding() is used to add or move active bindings in Idf and IdfObjects to directly return objects in class or field values. This will make it possible to dynamically show current class and field names in both RStudio and in the terminal. However, this process does come in with a penalty on the performance. It can make adding or modifying large mounts of [Idf] and [IdfObject]s extremely slow. Default value make sure autocompletion works in interactive mode.

• A new syntax class := list(field = value) in $set() has been added. Note the use of := instead of =. The main difference is that, unlike =, the left hand side of := should be a valid class name in current Idf object. It will set the field of all objects in specified class to specified value. • A new function dt_to_load() has been added, which formats a data.table from Idf$to_table() and IdfObject$to_table() with wide being to TRUE into a data.table in acceptable format for Idf$load() method and Idf$update() method. • Now read_epw() support EPW files with non-integer timezones fail to load (#113). $location() in Epw class also support setting the timezone to non-integer one.

• A new method $parent() has been added in IddObject and IdfObject class to get parent Idd and Idf object, respectively (#76). • Simulation status will be updated in the progress message in run_multi() and $run() method in ParametricJob class, instead of only showing COMPLETED (#124, #125).

• EplusJob class now will parse and store input IDF and EPW. It will also add Output:SQLite and Output:VariableDictionary object if necessary. This change makes sure using EplusJob can always have the ability to extract simulation results instead of totally relying on the input IDF (#118).

• As a result of previous change, the $run() method in EplusJob now takes the same parameters as $run() method in Idf, i.e. you can also change the EPW file to use and output directory using epw and dir argument (#118).

• A new class EplusGroupJob is added. It can be created using group_job(). EplusGroupJob provides a wrapper of run_multi() to group multiple EnergyPlus simulations together for running and collecting different EnergyPlus outputs (#117).

• A new parameter named .empty has been added in $set(), $insert(), $load(), $update(), $paste() methods in Idf class and $set() method in IdfObject class (#133).

• EnergyPlus v9.2 support has been added (#138).

• Now required objects and unique objects can be deleted in $del() when .force is set to TRUE (#149). • Now for Windows and Linux, install_eplus() supports to install EnergyPlus to your home directory or your customized directory without requiring administrator privileges (#167).  # install to your home directory install_eplus(8.8, local = TRUE) # install to custom directory install_eplus(8.8, local = TRUE, dir = "~/MyPrograms") Please see ?install_eplus for details. • All documentation in R6 classes have been update thanks to roxygen2 R6 support (#156). • Deprecated methods in each class have all been remove (#156). • New parameter case has been added in EplusSql$tabular_data(). Similar like case parameter in EplusSql$report_data(), it lets you to add a case column to indicate the case of simulation. This brings some changes in the returned results of EplusSql$tabular_data(). Compared to previous version, there will always be a case column, unless case parameter is set to NULL (#182).

• New parameter wide and string_value have been added in EplusSql$tabular_data() and EplusGroupJob$tabular_data(). When wide is TRUE, each table will be converted into the similar format as it is shown in EnergyPlus HTML output file. And when string_value is FALSE, values in possible numeric columns are converted into numbers (#182).

### Bug fixes

• Fix the error in $set() when $add_unit() is performed in Epw class (#56).
• Now IDF file located in a folder whose name contains spaces can be successfully simulated (#60). Thanks @yidan1214 for reporting this bug.
• Now $ref_to_object() and $ref_by_object() can give correct results when class argument is specified.
• Now IDD version lower than 8.3 can successfully be downloaded and parsed.
• Now ErrFile objects returned from $errors() in ParametricJob can be successfully printed. • Now one-line empty objects, e.g. "Output:Surfaces:List,,;\n", can be successfully parsed (#88). • Fix the error of $to_table() when no arguments were provided (#103).
• The references of newly added extensible fields are now correctly handled (#109).
• $update() now works for class Schedule:Compact with type checking on (#111). • Fix the error in $ref_to_node() when no objects in specified class is found (#110).
• Now leading and sep_at argument work as expected in Idf$to_string() (#160). • Now Idf$to_table() matches object names case-insensitively (#157).
• One-line-formatted Version object with trailing comments can be successfully parsed, e.g. Version, 8.6; !- ABC (#170).
• Better support for old IDD (#183).

### Minor changes

• Describe on how the arguments are matched in $apply_measure() (#57). Thanks @yidan1214 for pointing this out. • Now the echo argument in run_idf() and run_multi() will only take effect when wait is TRUE. This makes it possible to remove the dependency on the later package. • All messages can be suppressed by setting the verbose_info option to FALSE. • $delete() method in Epw class has been deprecatd in flavor of $del() to provide a similar API as Idf class. • When all is TRUE in $report_data() in EplusSql, EplusJob and ParametricJob class, an extra column environment_period_index is returned which contains the indices of each run period environment. This helps to distinguish different run period environment when no name is assigned.
• param_job() now gives more informative error message if input Idf object and Epw object is not created from a local file (#112).
• param_job() now preserve parametric model names from argument .names in $apply_measure() instead of calling make.name() to convert them into valid R names (#115). • $save() works if weather was not given during initialization for ParametricJob (#120).
• Required fields in IdfObject are now marked with * when printing (#135).

This is a bug fix release which make sure eplusr is compatible with new version of R6 #164. No new feature is included.

### New features

• Now you can get autocompletion of class names of Idd and Idf objects, and field names of IdfObject class in RStudio.
• [[<-.Idf and $<-.Idf now can work with unique-object classes as well. • A new method $update() is added in Idf class which makes it possible to directly modify existing objects using character vectors and data.frames.
• A new argument wide is added in $to_table() method in Idf class, similar to $to_table() method in IdfObject class.
• New function read_rdd() and read_mdd() are added to help to directly parse .rdd and .mdd file.
• Now $rename() will not give an error if input name is the same as the old one. • Now new method $version() is added in EplusJob and ParametricJob class, which returns the version of IDF it uses.
• A new argument by_group is added in $class_index(), $class_name() in Idd class and $class_name() in Idf class. If TRUE, a list is returned which separate class indexes/names by the group they belong to. • Recursive relation support has been added to $object_relation() in Idf class, and $value_relation(), $ref_to_object(), $ref_by_object() in IdfObject class. All type of relations can be searched recursively by setting newly added argument recursive to TRUE. There is also a new argument called depth to control how many recursive searching steps should be performed. • Add Node support into $value_possible() in IdfObject class, i.e. if specified fields are nodes, all nodes are returned in the source component.
• Now component node references support has been added. A new option "node" has been added to the direction argument in $object_relation, $objects_in_relation() in Idf class and $value_relation() in IdfObject class. New methods $ref_to_node() and $has_ref_node() have been added in IdfObject class. Now $has_ref() in IdfObject class will return FALSE only when all $has_ref_to(), $has_ref_by() and $has_ref_node() are all FALSE. ### Bug fixes • Now all internal data, specifically all data.tables are correctly copied when calling $clone() in Idf and Epw class.
• $add() method and other methods that modify field values can correctly convert field values to numbers if necessary. • Fix the error that holiday header got overwritten (#43). • Fix EPW date parsing error (#42). • Fix warnings in parsing .err file when there is no warning nor error. • Fix $errors() error in ParametricJob class.
• The year of returned date time from $data(), $abnormal_data() and $redundant_data() now have correct values (#44). • Reset year after checking datetime in read_epw() (#44). • Add field name in input before validation in paste() (#45). • Fix datetime calculation in $report_data() in EplusSql (#46).
• Update doc on EnergyPlus time notation (#47).
• Fix EPW design condition parsing error when hours_8_to_4_12.8_20.6 is zero.
• Now recurring errors in .err file are parsed correctly in ErrFile.
• Handle large value references in get_value_reference_map() (#50).
• Fix the error when extract numeric default values using $value_possible() (#51). • Fix the error that .ref_to argument in $del() in Idf class did not take effect.
• Fix field deletion in $update() in Idf class. • Fix reference parsing error with mixed source types. • External files used in Schedule:File class are now only copied once when copy_external is TRUE in $save() in Idf class.
• When .ref_to or .ref_by is TRUE in $del() in Idf class, objects whose class names are referenced by input will not be deleted, except all objects in referenced class are detected by field value reference or there is only one object in referenced class. • Objects detected using .ref_to and .ref_by in $del() in Idf class can now be successfully deleted, even if they still have relations with other objects.
• Now invalid input object name is kept as it is, instead of converted to lower case.
• Now $value_possible() returns correct source values when fields refer to class names rather than field values. • Now $del() method in Idf class works correctly with multiple inputs.
• Now trailing comments in IDF will be removed in read_idf().
• Now $to_table() in Idf class will keep the input object order. • Now $set() method in IdfObject can successfully delete fields when field values are set to NULL.
• Now $run() method in Idf will use the correct model path to run simulation. ### Minor changes • Change message types in $ref_to_object() and $ref_by_object() in IdfObject. • Now ErrFile is stored as a data.table with additional attributes instead of a list. • Now when argument .unqiue is TRUE in $insert(), $load() and $paste() in Idf class, object comparison are performed case-insensitively.
• A new default value "." of dir in download_idd() is add.

This is a patch update mainly to fix CRAN check errors on a strict Latin locale, with a bug fix.

• $report_data() method in EplusSql class now correctly returns data if even if key_value is not given (#37) This is a patch update mainly to fix CRAN check errors, with few bug fixes. ### Bug fixes • $set() method in Idf class now does not try to convert all input strings into numbers (#32)
• $del() method in Idf class now also respects validation settings. You should be able to delete any object if current validation level does not include reference checking • $del() method in Idf class now will only print object relation only if .ref_to or .ref_by is TRUE
• Now $set() method in Epw class will correctly reset leap year flag in the header (#32) • Now $save() method in Epw class returns the path of saved file invisibly

eplusr v0.10.0 introduces dozens of improvements, unfortunately also has some break changes. Detailed updates per class are as follow:

### Idd Class

• $object() now takes a single class name and returns an IddObject. • New method $objects() is added as the successor of $object() in previous versions. • New method $object_relation() and $objects_in_relation() are added to get all objects that have relation (one refer to others or one referred by others). • $object_in_group() has been deprecated in flavor of $objects_in_group(). • New method $to_table() and $to_string() are added to help easily extract internal IDD data in data.table format and string format respectively. • $clone() method is now deprecated.

• S3 method str.Idd(), format.Idd() are added.

### IddObject Class

• A constructor idd_object() has been added to help directly create IddObject. It takes a parent IDD version or an Idd object and a valid class name or class index, e.g. idd_object(8.8, "Material"), idd_object(use_idd(8.8), "Construction")

• New method $version() is added to extract the version of parent IDD. • New method $field_relation() is added to extract the field relation in current class with other class fields.

• New method $has_ref(), $has_ref_to(), and $has_ref_by() are added to help to detect field relations • New method $is_real_field() is added to detect if specified fields should have values of real numbers but not integers.

• New method $has_ref(), $has_ref_by(), $has_ref_to() are added to detect if specified fields refer to other fields or can be referred by other field in other classes. • New method $to_table() and $to_string() are added to help easily extract internal IDD data in data.table format and string format respectively. • field_possible() now does not need IdfObject data to run. • Argument lower in $field_name() has been deprecated.

• $field_reference() in IddObject class has been deprecated in flavor of $field_relation().

• A brief argument is added in $print() with default value of FALSE. If TRUE, only the class name of the IddObject is printed. • $clone() method is now deprecated.

• S3 method format.IddObject(), as.character.IddObject() and str.IddObject() are added which calls $to_string() and $print().

### Idf Class

• An argument sorted is added in $class_name() and $group_name()to control whether to sort the returned value according to the occurrence in IDD or not.

• $definition() now only accepts one class name and returns a single IddObject, not a list of IddObject. • $object() now takes a single object ID or name and returns an IdfObject.

• New method $objects() is added as the successor of $object() in previous versions.

• New method $object_unique() is added which returns an IdfObject in unique-object class, e.g. SimulaSimulationContrl. This makes it easy to directly extract and modify those objects, e.g. model$object_unique("SimulationContrl")$set(...). • $object_in_class() now is deprecated in flavor of $objects_in_class(). • New method $objects_in_group() is added to get all objects in specified group.

• $search_object(), $search_value() and $replace_value() now can take same arguments as base::grepl() to further control the way it searches objects. • $replace_value() now will perform validations when replacing value.

• Now all methods in Idf class that return IdfObjects will not convert object names into valid R names. The former conversion behavior is unnecessary and a little bit confusing.

• $add_object(), $set_object(), $del_object(), $ins_object() and $del_object() are now all deprecated. Please use $add(), $set(), $del() and insert() instead, which provide much cleaner syntax.

• New method $rename() is added which helps to modify only object names. • New method $paste() is added which will parse contents that copied from IDF Editor using the Copy Obj button and directly insert them into current Idf.

• $validate() and $is_valid() now accepts an argument level. Also, a helper custom_validate() is added to customize what kind of validations to check.

• $string() is deprecated in flavor of $to_string() in Idf class.

• New method $to_table() is added which can extract object data into a data.table. • The default value of deep argument in $clone() method is set to TRUE. As in almost all cases, a total cloned object is desired when calling $clone(). • plain argument is deprecated in $print() in IDF class. Because the same thing can be achieved using $to_string() and base::cat(). New argument zoom and order are added, which give more control on how detailed should the model be printed. • New method $object_relation() and $objects_in_relation() are added to extract all objects in relation. ### IdfObject Class • New constructor idf_object() is added. • New method $version() is added to get the underlying version of IDD.

• $get_comment(), $get_value() now have been deprecated in flavor of $comment() and $value()

• $comment() (former $get_comment()) now returns NULL if the object does not have any comment.

• $set_value() now has been deprecated in flavor of $set()

• $possible_value() now has been deprecated in flavor of $value_possible().

• $ref_from_object() and $has_ref_from() now have been deprecated in flavor of $ref_to_object() and $has_ref_to().

• $has_ref_by(), $has_ref_to() and $has_ref() now return a logical vector of the same length as field numbers. • $validate() and $is_valid() now accepts an argument level. Also, a helper custom_validate() is added to customize what kind of validations to check. • $string() and $table() are now deprecated in flavor of $to_string() and $to_table(). • $clone() method is now deprecated.

• S3 methods format.IdfObject(), as.character.IdfObject() and str.IdfObject() are added, which calls $to_string() and $value().

### Epw Class

• Epw class has been totally rewritten which provides much more functionalities. Please refer to package documentation for details. All headers are parsed and can be retrieve in Epw class.

• The default value of deep in $clone() has been change to TRUE. ### EplusSql Class • New method $path_idf() is added to return the parent IDF file path.

• New arguments period, month, day, hour, minute, interval, simulation_days, day_type and environment_name are added in $report_data() which provide extra subsetting on the SQL file. • New arguments report_name, report_for, table_name, column_name and row_name are added in $tabular_data() which provide extra subsetting on the SQL file.

• $clone() method is now deprecated. ### EplusJob Class • New method $path() is added to return the path of IDF and/or EPW file of the job.

• New method $list_table(), $read_table() are added which provide the same functionalities as they are in EplusSql class.

• $clone() is now deprecated. • New arguments period, month, day, hour, minute, interval, simulation_days, day_type and environment_name are added in $report_data() which provide extra subsetting on the SQL file.

• New arguments report_name, report_for, table_name, column_name and row_name are added in $tabular_data() which provide extra subsetting on the SQL file. • $clone() method is now deprecated.

### ParametricJob Class

• New arguments force and copy_external are added in $run() which have the same effect as in $run() method in Idf class.

• New arguments period, month, day, hour, minute, interval, simulation_days, day_type and environment_name are added in $report_data() which provide extra subsetting on the SQL file. • New arguments report_name, report_for, table_name, column_name and row_name are added in $tabular_data() which provide extra subsetting on the SQL file.

• $clone() method is now deprecated. ### Miscellaneous • Function read_err() is added which takes a path of an .err file, parses it and returns an ErrFile object. • Functions is_eplus_ver(), is_idd_ver(), is_eplus_path(), is_idd(), is_idf(), is_iddobject(), is_idfobject() and is_epw() are now exported. • Function custom_validate() and level_checks() are added to customize validation. • Right now, all returned object and field names will remain what they are as in the IDF, instead of converting them into underscore style names in the returned lists. • The num_digits option has been deprecated as formatting of numeric fields are now handled by R itself. • Error will be given instead of warning if there is no build tag or multiple build tags found in input IDD. • eplusr_option() accepts custom validate level using newly-added function custom_validate(). ### New features • Now you can directly download EnergyPlus Weather File (.epw) and Design Day File (.ddy) using new function download_weather(). It takes a regular expression as input, searches through EnergyPlus weather data base (stored in this package), download corresponding files and return the saved paths. Below are some examples: • Search locations that contains string "los angeles" and "tmy", return a menu to select which one(s) to download. Once selected, download both corresponding weather file(s) and design day file(s):  download_weather("los angeles.*tmy", type = "all", ask = TRUE) • Same as above, expect that all files will be renamed to la.epw(ddy), la_1.epw(ddy), la_2.epw(ddy):  download_weather("los angeles.*tmy", filename = "la", type = "all", ask = TRUE) • Search locations that contains string "beijing" and "cswd". If no more than 3 results found, directly download all weather files and save them to temporary directory.  download_weather("beijing.*cswd", dir = tempdir(), type = "epw", ask = FALSE, max_match = 3) ### Minor changes • Now clean_wd() is run before every call to EnergyPlus. ### Bug fixes • $clone() method has been refactored for Idf and Idd class. This fix the issue that internal shared environments were not cloned in version 0.9.3.

• Fix the error that $save() and $string() in Idf class did not respect format argument.

• Fix the error of missing Idf file when dir is not NULL in $run() in Idf class. ### Minor changes • Long lines in err files now will be wrapped when printed. ### Bug fixes • Fix the error when checking invalid extensible fields in value validation. • Fix the error that value references did not get updated when setting values to NA in $set_value() in IdfObject and $set_object() in Idf. ### Break Changes • parallel_backend argument in run_multi() has been removed, due to the reason that supporting remote parallel computing is out of the scope of this package. This makes it possible to remove both future and furrr package dependencies. The default behavior of run_multi() does not change if running on local machine, as it still runs multiple EnergyPlus instances in parallel. • In run_idf() and run_multi(), eplus argument has been moved to be the last argument with default value setting to NULL. This will make them a little bit more convenient to run EnergyPlus without explicitly specify the version. If NULL, the version of EnergyPlus is automatically detected using the version field of input model. For example: r # before run_idf(8.8, model.idf, weather.epw) # after run_idf(model.idf, weather.epw)  • Both argument echo and wait have been added to run_idf() and run_multi(). Unlike the behavior in eplusr 0.8.3 when echo is TRUE in run_idf(), right now echo only control whether to show the output from EnergyPlus command line interface. Please use wait to control whether to wait until the simulation is complete or not. ### New features • Package documentation has been heavily updated. Examples of every exported class and most functions have been added. Also, an example IDF file "1ZoneUncontrolled.idf" from EnergyPlus v8.8.0 is included in the package, which makes it possible to run most examples without installing EnergyPlus. Of cause, for examples in EplusJob and ParametricJob class, EnergyPlus installation is needed to run them successfully. • The brilliant package crayon is used to support colorful printing of Idd, Idf, IddObject, IdfObject, Epw, EplusJob and ParametricJob classes. • A new type of "character" validation has been added, which will check if field values should be characters but are not. • A new option copy_external has been added in $run() in Idf class. If TRUE, the external files will also be copied into the output directory. Currently, only Schedule:File class is supported. This ensures that the output directory will have all files needed for the model to run.

• $validate() in Idf and IdfObject class will also check incomplete extensible groups. Extensible groups that only contain any empty field are treated as invalid. • New methods $field_reference() and $field_possible() have been added into IddObject class. $field_possible() is basically the same as the $possible_value() in IdfObject class. This makes it possible to show all available references for a class that does not have any object yet. $field_reference() only returns all available reference values for specified fields. NOTE: $field_reference() and $field_possible() can only be used in IddObjects that are created using $definition() in Idf class and IdfObject class, and cannot be used in IddObjects that are created using $object() or equivalent in Idd class. This is because both methods need shared Idf value data to collect all reference values.

### Minor changes

• use_eplus() now returns an invisible list of EnergyPlus configure data instead of NULL.

• The default value of dir argument in download_eplus() has been removed, which enforce the user to explicitly specify the directory to save EnergyPlus installer file, as per CRAN reviewer comment.

• A new option "auto" for download argument in use_idd() has been added, which will automatically download corresponding EnergyPlus IDD file if the file or Idd object is currently not available.

• The dir argument in install_eplus() has been removed, as per CRAN reviewer comments. The EnergyPlus installer file will be saved into tempdir().

• The default value of dir argument in $run() in Idf class has been removed, as per CRAN reviewer comments. Users can explicitly set dir to NULL if they want to use the directory of input IDF file. • The default value of echo in run_idf() has been changed to TRUE, which will always show EnergyPlus simulation process to the console. • Fix the error of output_dir argument checking in rum_multi(). • Now an informative error message is given when there is no SQL output found when trying to read simulation output using $report_data(), $report_data_dict and tabular_data() in EplusJob class. • run_idf() and run_multi() now does not call clean_wd() as this is automatically handled by EnergyPlus itself. ### Bug fixes • Fix errors when try to get units $field_name(), $field_unit() and $field_default() in IddObject class.

• Fix the error that $get_value() and $table() in IdfObject class did not return all field values even all was set to TRUE.

• Fix the error that $table() in IdfObject class did not return field units even unit was set to TRUE. • Fix the error that $replace_value() in Idf class did not update object names.

• Fix the error when unit is set to TRUE in $get_data() in Epw class. • Fix the error that $state_province in Epw class always returns NULL.

• Fix the error of missing expanded IDF files which occurred randomly in run_multi().

### New features

• A new method $possible_value() has been added into IdfObject class, which will return all possible values for selected fields, including auto-value (autosize or autocalculate), default, range, choices and references. • New parameter dir has been added to install_eplus(), which makes it possible for keeping the downloaded EnergyPlus installation file. • $dup_object() in Idf class now can duplicate one object multiple times.

### Minor changes

• The names of returned list of $get_value() in IdfObject is “underscore” name, not lower name. This makes its behavior being consistent with $object() in Idf class.

• When wait is FALSE, $run() in EplusJob and ParametricJob will return itself instead of the time when simulation started. • A clear message will be given when trying to run $kill() in ParametricJob, which inform the user that currently $kill() does not for parametric simulations. • A warning will be given if no configuration data found in eplus_config(). • Now the names of returned list from $search_object() in Idf class will also be underscore-style object names, which makes its behavior being consistent with $object() and $object_in_class(). Also, if no results found, $search_object() now will return invisible NULL and give a message. • $dup_object() will give an error if given new_name is the an existing object name.

### Minor changes

• The names of returned list of $get_value() in IdfObject is “underscore” name, not lower name. This makes its behavior being consistent with $object() in Idf class.

### Bug fixes

• Fix warning messages of column type coercion from data.table in Idf and IdfObject.

• $set_value() in IdfObject and $set_object() in Idf now will delete empty fields with empty value. This fix the error when trying to reassign only some empty fields which have been deleted before.