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gnuplotsmoothing

Smoothing the boundary of graph - gnuplot

In gnuplot, given f and g two functions from plane to real line, I am going to plot f as g gets positive values. I have this code:

set xrange [-2:2]
set yrange [-2:2]
set isosamples 100,100 
unset grid 
unset key  
set view map
f(x,y) = x*x*exp(-x*x)*y*y*exp(-y*y)
g(x,y) = x**2  - y**2

h(x,y) = g(x,y)> 0 ? f(x,y) : 1/0

splot h(x,y) with pm3d

I obtain this:

enter image description here

I would like to smooth the boundary of this image.

Thanks in advance

Solution

  • I assume it should read g(x,y) = x**2 - y**2. Play with the parameters samples and isosamples. Check help samples and help isosamples.

    For example:

    set samples 300
set isosamples 300

    Result:

    enter image description here