R: Calculate colours from wavelength.

stat_color {ggspectra} | R Documentation

## Calculate colours from wavelength.

### Description

`stat_color` computes color definitions according to human vision.

### Usage

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

### Arguments

`mapping` | The aesthetic mapping, usually constructed with `aes` or `aes_`. Only needs to be set at the layer level if you are overriding the plot defaults.
`data` | A layer specific dataset - only needed if you want to override the plot defaults.
`geom` | The geometric object to use display the data
`type` | character one of "CMF" (color matching function) or "CC" (color coordinates).
`position` | The position adjustment to use for overlapping points on this layer
`na.rm` | a logical value indicating whether NA values should be stripped before the computation proceeds.
`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.
`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`.
`...` | other arguments passed on to `layer`. This can include aesthetics whose values you want to set, not map. See `layer` for more details.

### Value

The original data frame with a variable with color definitions added.

### Computed variable

color

  color corresponding to x-value giving wavelength in nanometres.

### Default aesthetics

Set by the statistic and available to geoms.

color

  ..color..

fill

  ..color..

### Required aesthetics

Required by the statistic and need to be set with `aes()`.

x

  numeric, wavelength in nanometres

y

  numeric, a spectral quantity

### See Also

`color_of`, which is used internally.

Other stats functions: `stat_label_peaks`, `stat_peaks`, `stat_wb_box`, `stat_wb_column`, `stat_wb_contribution`, `stat_wb_hbar`, `stat_wb_irrad`, `stat_wb_label`, `stat_wb_mean`, `stat_wb_relative`, `stat_wb_sirrad`, `stat_wb_total`, `stat_wl_strip`, `stat_wl_summary`

### Examples

    library(photobiology)
    library(ggplot2)
    ggplot(sun.spct) + geom_line() +
      stat_color() + scale_color_identity()

[Package ggspectra version 0.2.3 Index]