[Gnuplot-info] Images with missing data

[Jacques B. <jac...@on...>]

Hello,

The image style is a very useful new feature of gnuplot. Wouldn't it be even
more useful if there were a way to take into account missing data in the file?

Example: you want to render a function of longitude and latitude with undefined
values on some areas.

These undefined values could be represented with a special number or string in
the file (for example the one defined with "set datafile missing"). Just now,
data with missing values can't be plotted using "with image".

I would like to do a quick and dirty change in the gnuplot source in order to
render these missing values with a given RGB color. Is it easy to do?