Labeling values in a GNUplot heatmap

Posted by andremo on Super User See other posts from Super User or by andremo
Published on 2012-04-07T10:43:10Z Indexed on 2012/04/07 11:36 UTC
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I am trying to generate a heat map using gnu plot.

set title "Heat Map"

plot '-' matrix with image

10  20  30  40  50  60  70  80  90  100
20  30  40  50  60  70  80  90  100 0
30  40  50  60  70  80  90  100 0   0
40  50  60  70  80  90  100 0   0   0
50  60  70  80  90  100 0   0   0   0
60  70  80  90  100 0   0   0   0   0
70  80  90  100 0   0   0   0   0   0
80  90  100 0   0   0   0   0   0   0
90  100 0   0   0   0   0   0   0   0
100 0   0   0   0   0   0   0   0   0
e

Image generated

Along the axes I get values -2 0 2 4 6 8 10, and I would like to replace those with a custom string. I cannot find out how to do this.

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