Color table

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

# S4 method for SpatRaster
coltab(x)

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

# S4 method for SpatRaster
has.colors(x)

Arguments

x

SpatRaster

layer

positive integer, the layer number or name

value

a two-column data.frame (first column the cell value, the second column the color); a vector of colors (the first one is the color for value 0 and so on); or a four (value,red,green,blue) or five (including alpha) column data.frame also from 0 to n; or NULL to remove the color table. You can also supply a list of such data.frames to set a color table to all layers

...

additional arguments (none implemented)

Value

data.frame

Examples

r <- rast(ncols=3, nrows=2, vals=1:6)
coltb <- data.frame(value=1:6, col=rainbow(6, end=.9))
coltb
#>   value     col
#> 1     1 #FF0000
#> 2     2 #EBFF00
#> 3     3 #00FF29
#> 4     4 #00C2FF
#> 5     5 #5200FF
#> 6     6 #FF0099

plot(r)


has.colors(r)
#> [1] FALSE
coltab(r) <- coltb
plot(r)

has.colors(r)
#> [1] TRUE

tb <- coltab(r)
class(tb)
#> [1] "list"
dim(tb[[1]])
#> [1] 6 5