how to read individual values from a pixmap object

Tony Gill <t.gill1 <at> uq.edu.au> writes:

Hi All,

I have a greyscale image that I am reading in through RGDAL and placing in a
pixmap object.

library(pixmap)
x <- read.pnm("graypic.pnm")
str(x)
x at grey[1,1]