r - Add text and line to an `image()` in graphics -


i generated image in r two-dimensional data - x. 

graphics::image(ifelse(drop(x)!=0, x, na))

i add text , line image.

i attempted text(10, 10, "testing") , segments(5, 10, 20, 25), neither text nor line displayed.

as @mrflick mentioned, image() rescales values 0-1 range.

see below example:

#dummy data set.seed(123) x <- matrix(runif(100),nrow=10)  #plot image(x)  #add text , line text(0.1,0.1,"text") segments(0.5,0.1,0.2,0.25)

enter image description here


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