terra: RGB – R documentation

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RGB

Declare RGB channels

Description

With RGB you can get or set the layers to be used as Red, Green and Blue when plotting a SpatRaster. Currently, the sole benefit of this is that plot will send the object to plotRGB

With RGB2col you can convert a three-layer RGB SpatRaster into a single-layer SpatRaster with a color-table.

Usage

## S4 method for signature 'SpatRaster'
RGB(x)

## S4 replacement method for signature 'SpatRaster'
RGB(x)<-value

## S4 method for signature 'SpatRaster'
RGB2col(x, value, stretch=NULL, grays=FALSE, filename="", overwrite=FALSE, ...)

Arguments

`x`	SpatRaster
`value`	vector of three positive integers indicating the layers that are red, green and blue. Or `NULL` to remove the RGB settings. With `rgb2coltab`, this can be missing if `RGB` is not `NULL`
`stretch`	character. Option to stretch the values to increase contrast: "lin" (linear) or "hist" (histogram)
`grays`	logical. If `TRUE`, a gray-scale color-table is created
`filename`	character. Output filename
`overwrite`	logical. If `TRUE`, `filename` is overwritten
`...`	additional arguments for writing files as in `writeRaster`

Examples

s <- rast(system.file("ex/logo.tif", package="terra"))   
RGB(s) <- c(1,2,3)
plot(s)
RGB(s) <- NULL

terra

Spatial Data Analysis

v1.2-10

GPL (>= 3)

Authors

Robert J. Hijmans [cre, aut] (<https://orcid.org/0000-0001-5872-2872>), Roger Bivand [ctb] (<https://orcid.org/0000-0003-2392-6140>), Karl Forner [ctb], Jeroen Ooms [ctb] (<https://orcid.org/0000-0002-4035-0289>), Edzer Pebesma [ctb] (<https://orcid.org/0000-0001-8049-7069>)

Initial release

2021-05-12

RGB

Description

Usage

Arguments

Examples

terra

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