[Gnuplot-info] newbie asking for help with 'matrix' plot

[melysion <ali...@ya...>]

Hi there

I've only just come across gnuplot and it all seems excellent so far.

I have a plot to do and I was wondering whether gnuplot would be a good
piece of software to do it.  I'll have a matrix file like so

1 1 20
1 2 45
1 3 46
2 1 45
etc ...

If one imagines the first two columns as 'objects' the third column is a
measure of similarity between those two objects. I want to create a 2D grid
- it will probably be about 40 squares by 40 squares in size. I would like
the measure of similarity between the two objects to be highlighted as a
specific colour.

I've looked at pm3d plots but I'm not even sure whether thats the best place
to start. Any tips very much appreciated.
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