colors: Color table

Description Usage Arguments Value Examples

Description

Get or set color table(s) associated with a SpatRaster. Color tables are used for associating colors with values, for use in mapping (plot).

Usage

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

## S4 replacement method for signature 'SpatRaster'
coltab(x, layer=1)<-value

Arguments

x

SpatRaster

layer

positive integer, the layer number or name

value

a vector of colors; or a three (red,green,blue) or four (alpha) column data.frame with no more than 256 rows; or NULL to remove the color table

Value

data.frame

Examples

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r <- rast(ncols=3, nrows=2, vals=0:5)
coltb <- data.frame(t(col2rgb(rainbow(6, end=.9), alpha=TRUE)))
coltb

plot(r)
coltab(r) <- coltb
plot(r)

tb <- coltab(r)
class(tb)
dim(tb[[1]])

terra documentation built on Oct. 11, 2021, 9:09 a.m.