gnuplot - changing the tics in pm3d map

Question

Well, I am trying to plot a matrix-like data file using pm3d option as follows

set pm3d map
set pm3d interpolate 0,0
splot namefile matrix

I have tried to upload an image but it seems I don't have enough reputation. Ok, so the problem is that the data come from logarithmic binned x and y axes, but the default option for the tics separation is the lineal one (1, 2, 3, ... ). If I want to rescale the tics to another interval, it is easy as long as I keep this linearity ( e.g: 0, 10, 20,... ). However I would like to rescale them to my data interval but logarithmically separated (1, 10, 100,... ). Of course, what I only want to change are the tics, whereas the proportion within the plot is kept the same.

After thinking and looking around I could not find a satisfactory answer. Any hint on how to solve it ?

Thank you !

Christoph Christoph · Accepted Answer · 2014-07-19T09:20:59

If you only want to change the tics, but not the scaling of the data you must manually set the tics like

set for [i=1:5] xtics add (sprintf('%.0f', 10**(i-1)) i)
set for [i=1:5] ytics add (sprintf('%.0f', 10**(i-1)) i)

gnuplot - changing the tics in pm3d map

1 Answers