#2734 unchangeable sample size of 10 on y axis in pm3d map

[Mark Jelasity]

Version 6.0 patchlevel 0, ubuntu 24.04.0

Starting gnuplot and the immediately typing only

gnuplot> set pm3d map
gnuplot> splot xx+yy

produces the attached output. Apparently the y axis has a fixed sample size of 10, and this cannot be changed by "set samples" either. Other 2D contour map use cases could be affected. I was not able to find a fix.

[Mark Jelasity]

of course it isx*x+y*y (formatting went wrong)

[Ethan Merritt]

The sampling intervals along x are controlled by set samples; the intervals along y are controlled by set isosamples. I do not know why the name "isosamples" was chosen.

set pm3d map border lt black
set samples 50
set isosamples 50
splot x*x + y*y

[Mark Jelasity]

Thank you, I could not figure this out for the life of me... In my opinion in this setup the x and y axis have the exact same role. Anyway, now I know.