halo.Rd
Add text to a plot that has a "halo". That is, a buffer around it to enhance visibility.
halo(x, y=NULL, labels, col="black", hc="white", hw=0.1, ...)
numeric. coordinates where the text labels should be written
character. The text to be written
character. The main color to be used
character. The halo color
numeric. The halo width
additional arguments to pass to text
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)