Re: [Gnuplot-info] is painting with corners2color working incorrectly for Y axis?

[Norwid B. <nb...@ya...>]

Hello,

not sure if I understood you well, I see two approaches for the task ahead.
However in both instances, because it is about the visualization of a grid --
regardless if the visualization retains the 3D perspective, or is a 2D
projection / a map -- I would use `isosamples` instead of `samples`.

Option i) retains the pm3d map and offers a smoother visual representation by
increase of the `isosample` parametre alone

```
set terminal x11;
set size square;
set xrange [-3:3]; set yrange [-3:3];
set isosamples 100, 100;  # number of isosample points along (x,y)

sigma = 2.0;
f(x,y) = (1/(2*pi*sigma**2)) * exp(-(x**2+y**2)/(2*sigma**2));
set grid;
set pm3d map corners2color c1;
splot f(x,y);
```

Option ii) presumes you seek a presentation with contour lines, can both afford
gnuplot defines the corresponding levels, and the absence of the pm3d map:

```
set terminal x11;
set size square;
set xrange [-3:3]; set yrange [-3:3];
set isosamples 100; # number of isosample points along x equals the along y

sigma = 2.0;
f(x,y) = (1/(2*pi*sigma**2)) * exp(-(x**2+y**2)/(2*sigma**2));
set grid;
set contour base;
unset surface;  # no need to display the grid by `isosample`
set view map;
splot f(x,y);
```

Both approaches were tested with gnuplot 6.0.0 as provided by Linux Debian
13/trixie.

Norwid