Remove “empty space” in splot with log scaled z axis

Question

I have a gnuplot script which generates a surface plot from data. I've scaled the z axis logarithmically, such as in an example on gnuplot.info¹ - and just as in the example, I get a lot of empty room at the "bottom" of the plot.

In that example, the ticks on the z axis end at 1, but the axis doesn't end there - the origin of the plot is further "down" (in the z direction).

How do I set the origin to be where the data actually starts? A dynamic approach (that's not dependent on me knowing the data set in advance) is greatly preferred, if it's possible.

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^{1 Follow the link and search the page for "Surfaces with z log scale" to find the relevant example.}

Answer 1

This is not an obvious one, but (as usual) there is a setting for that. Try

set xyplane 1

and

help set xyplane

for more details.