Gnuplot 3d plot too high

Question

I have this plot

And as you can see, there\'s this gap between the zero and the bottom of the plot, is

Answer 1

I can't really test it without your data, but did you try to set the limits on the axis? if not set manually, octave sometimes takes liberties to shift the data.

https://www.gnu.org/software/octave/doc/interpreter/Axis-Configuration.html