stat: Calculate psychrometric properties of moist air

Description Usage Arguments Details Examples

Description

Calculate psychrometric properties of moist air

Usage

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stat_relhum(
  mapping = NULL,
  data = NULL,
  geom = "point",
  position = "identity",
  ...,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

stat_wetbulb(
  mapping = NULL,
  data = NULL,
  geom = "point",
  position = "identity",
  ...,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

stat_vappres(
  mapping = NULL,
  data = NULL,
  geom = "point",
  position = "identity",
  ...,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

stat_specvol(
  mapping = NULL,
  data = NULL,
  geom = "point",
  position = "identity",
  ...,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

stat_enthalpy(
  mapping = NULL,
  data = NULL,
  geom = "point",
  position = "identity",
  ...,
  na.rm = FALSE,
  show.legend = NA,
  inherit.aes = TRUE
)

Arguments

mapping

Set of aesthetic mappings created by aes() or aes_(). If specified and inherit.aes = TRUE (the default), it is combined with the default mapping at the top level of the plot. You must supply mapping if there is no plot mapping.

data

The data to be displayed in this layer. There are three options:

If NULL, the default, the data is inherited from the plot data as specified in the call to ggplot().

A data.frame, or other object, will override the plot data. All objects will be fortified to produce a data frame. See fortify() for which variables will be created.

A function will be called with a single argument, the plot data. The return value must be a data.frame, and will be used as the layer data. A function can be created from a formula (e.g. ~ head(.x, 10)).

geom

The geometric object to use display the data

position

Position adjustment, either as a string, or the result of a call to a position adjustment function.

...

Other arguments passed on to layer(). These are often aesthetics, used to set an aesthetic to a fixed value, like colour = "red" or size = 3. They may also be parameters to the paired geom/stat.

na.rm

If FALSE, the default, missing values are removed with a warning. If TRUE, missing values are silently removed.

show.legend

logical. Should this layer be included in the legends? NA, the default, includes if any aesthetics are mapped. FALSE never includes, and TRUE always includes. It can also be a named logical vector to finely select the aesthetics to display.

inherit.aes

If FALSE, overrides the default aesthetics, rather than combining with them. This is most useful for helper functions that define both data and aesthetics and shouldn't inherit behaviour from the default plot specification, e.g. borders().

Details

What these ggplot2::ggproto() objects do are to take input values, calculate the corresponding humidity ratio and replace the y aesthetic values in each group.

All of stats above requires two additional aesthetics:

However, when these stats are used inside a ggplot geom_* as the stat argument, both units and pres have to be specified.

Examples

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p <- ggpsychro() + geom_grid_relhum() # add relative humidity grid lines

# draw a point with dry-bulb at 30C and relative humidity at 60%
p + geom_point(aes(x = 30, relhum = 0.6), stat = "relhum", size = 5)

# draw a constant relative humidity line of 60% with dry-bulb from 20C to 30C
## use stat_* directly
p + stat_relhum(geom = "line", aes(x = 20:30, relhum = 0.6), size = 2)
## OR
## use as thet `stat` argument inside an ggplot `geom_*` function
p + geom_line(aes(x = 20:30, relhum = 0.6), stat = "relhum")

hongyuanjia/ggpsychro documentation built on Feb. 3, 2021, 12:31 p.m.