Create a RGB SpatRaster

Make a Red-Green-Blue SpatRaster from a single layer

Usage

make.RGB(x, col=grDevices::rainbow(25), breaks=NULL, alpha=FALSE, colNA="white", 
    zlim=NULL, zlimcol=NULL, ext=NULL, filename="", ...)

SpatRaster

x: RasterLayer
col: A color palette, that is a vector of n contiguous colors generated by functions like rainbow, heat.colors, topo.colors, bpy.colors or one or your own making, perhaps using colorRampPalette. If none is provided, rev(terrain.colors(255)) is used unless x has a 'color table'
breaks: numeric. A set of finite numeric breakpoints for the colours: must have one more breakpoint than colour and be in increasing order
alpha: If TRUE a fourth layer to set the background transparency is added
colNA: color for the background (NA values)
zlim: vector of lenght 2. Range of values to plot
zlimcol: If NULL the values outside the range of zlim get the color of the extremes of the range. If zlimcol has any other value, the values outside the zlim range get the color of NA values (see colNA)
ext: SpatExtent. Can be used to spatially subset the area covered to a region of interest
filename: character. Output filename
...: options for writing files as in writeRaster

r <- rast(system.file("ex/elev.tif", package="terra"))

r <- rast(system.file("external/test.grd", package="raster"))
x <- make.RGB(r)
plot(x)