Create a ggpsychro plot

ggpsychro() creates a ggplot object configured for psychrometric charts. It stores chart metadata, installs coord_psychro(), applies default axis labels, and adds theme_psychro() so psychrometric grids, states, zones, and comfort overlays can be added with the usual ggplot2 + workflow.

Usage

ggpsychro(
  data = NULL,
  mapping = aes(),
  tdb_lim = NULL,
  hum_lim = NULL,
  altitude = 0L,
  units = "SI",
  mollier = FALSE
)

Arguments

data

Default dataset to use for plot. If not already a data.frame, will be converted to one by ggplot2::fortify(). If not specified, must be supplied in each layer added to the plot.

mapping

Default list of aesthetic mappings to use for plot. If not specified, must be supplied in each layer added to the plot.

tdb_lim

A numeric vector of length-2 indicating the dry-bulb temperature limits. Should be in range [-50, 100] degrees C [SI] or [-58, 212] degrees F [IP]. If NULL, trained data ranges will be used when available, otherwise a default display range will be used. Default: NULL.

hum_lim

A numeric vector of length-2 indicating the humidity ratio limits. Should be in range [0, 60] g H2O per kg dry air [SI] or [0, 420] grains H2O per lb dry air [IP]. If NULL, trained data ranges will be used when available, otherwise a default display range will be used. Default: NULL.

altitude

A single number of altitude in m [SI] or ft [IP]. Default: 0.

units

A string indicating the system of units chosen. Should be either "SI" or "IP".

mollier

If TRUE, a Mollier chart will be created instead of a psychrometric chart. Default: FALSE.

Value

An object of class gg onto which layers, scales, etc. can be added.

Author

Hongyuan Jia

Examples

ggpsychro(tdb_lim = c(0, 50), hum_lim = c(0, 50))


ggpsychro(tdb_lim = c(0, 50), hum_lim = c(0, 50), mollier = TRUE)


ggpsychro(tdb_lim = c(0, 50), hum_lim = c(0, 50), units = "IP", altitude = 100)