> I need to make a chart displaying each Region as a small box (say 10x10 pixels) with
>a color of the given greyscale value.
> Plane in this case refers to the vertical axis of the chart. So the chart would
>display several thousand little boxes,
> where all the ones from Plane 1 are in one vertical line, Plane 2 the next 10 pixels
you might be better off writing a small program in C that takes that data
and writes a PPM image. (very basic image format) which you can then load
into GIMP and play with...any friends on a computing course you know?