halo: Add halo-ed text to a plot

In rspatial/terra: Spatial Data Analysis

Add halo-ed text to a plot

Description

Add text to a plot that has a "halo". That is, a buffer around it to enhance visibility.

Usage

halo(x, y=NULL, labels, col="black", hc="white", hw=0.1, ...)

Arguments

x, y	numeric. coordinates where the text labels should be written
labels	character. The text to be written
col	character. The main color to be used
hc	character. The halo color
hw	numeric. The halo width
...	additional arguments to pass to text

See Also

text, plot

Examples

 
r <- rast(nrows=4, ncols=4)
values(r) <- 1:ncell(r)
plot(r, col="blue", legend=FALSE)

text(-100, 20, "hello", cex=2)
halo(50, 20, "hello", cex=2)

halo(0, -20, "world", font=3, hc="light blue", cex=2, hw=.2)
halo(0, 90, "world", font=2, cex=2, hw=.2, xpd=TRUE, pos=2)
halo(0, 90, "world", col="white", font=2, hc="blue", cex=2, hw=.2, xpd=TRUE, pos=4)

rspatial/terra documentation built on April 28, 2024, 12:22 a.m.