text: Add labels to a map

In raster: Geographic Data Analysis and Modeling

Add labels to a map

Description

Plots labels, that is a textual (rather than color) representation of values, on top an existing plot (map).

Usage

## S4 method for signature 'RasterLayer'
text(x, labels, digits=0, fun=NULL, halo=FALSE, ...)

## S4 method for signature 'RasterStackBrick'
text(x, labels, digits=0, fun=NULL, halo=FALSE, ...)

## S4 method for signature 'SpatialPolygons'
text(x, labels, halo=FALSE, ...)

## S4 method for signature 'SpatialPoints'
text(x, labels, halo=FALSE, ...)

Arguments

x	Raster*, SpatialPoints* or SpatialPolygons* object
labels	character. Optional. Vector of labels with length(x) or a variable name from names(x)
digits	integer. how many digits should be used?
fun	function to subset the values plotted (as in rasterToPoints)
halo	logical. If TRUE a 'halo' is printed around the text. If TRUE, additional arguments hc='white' and hw=0.1 can be modified to set the colour and width of the halo
...	additional arguments to pass to graphics function text

See Also

text, plot

Examples

 
r <- raster(nrows=4, ncols=4)
r <- setValues(r, 1:ncell(r))
plot(r)
text(r)

plot(r)
text(r, halo=TRUE, hc='blue', col='white', hw=0.2)

plot(r, col=bpy.colors(5))
text(r, fun=function(x){x<5 | x>12}, col=c('red', 'white'), vfont=c("sans serif", "bold"), cex=2)

raster documentation built on April 4, 2025, 5:34 a.m.