Plotting a background image in R using rasterimage() going wrong?

Asked Sep 12 '16 at 09:13

Active Sep 12 '16 at 09:50

Viewed 216 times

I wanted to plot a runway behind a few points, so I tried the method suggested in the link : In R, how to plot with a png as background? The correct graph looks like this. But it seems to work only for one particular image, when I change the image or edit the same image, only the image gets plotted and not the points. Plot gone wrong.

There must be some silly mistake from my side. Can anyone please point it out as I'm new to R?

        plot(x = D, y = G , pch = c(15,16,17,18) , col = c("red", "blue", "green", "orange"), ylim = range(-40,40), xlim = range(0,2500), cex = 1.5)
        img <- readPNG("runway.png")
        lim <- par()
        rasterImage(img, lim$usr[1], lim$usr[3], lim$usr[2], lim$usr[4])}

edited May 23 '17 at 10:33

Community

asked Sep 12 '16 at 09:13

Savit Varchasvi Aluri

2

It would help to submit your code, so that others can see what's going on. – Pav El Sep 12 '16 at 09:20
Thanks Pav, did that :) – Savit Varchasvi Aluri Sep 12 '16 at 09:57
First thing, check your png image. You've got "19L" facing the wrong way - you should be able to read it from the outside. – Pav El Sep 12 '16 at 12:24

Plotting a background image in R using rasterimage() going wrong?

0 Answers0