Log scaling may be set on the x, y, z, x2 and/or y2 axes.
Syntax:
set logscale <axes> <base> unset logscale <axes> show logscale
where <axes> may be any combinations of `x`, `y`, `z`, and `cb` in any order, or `x2` or `y2` and where <base> is the base of the log scaling. If <base> is not given, then 10 is assumed. If <axes> is not given, then all axes are assumed. logscale turns off log scaling for the specified axes.
Examples:
To enable log scaling in both x and z axes:
set logscale xz
To enable scaling log base 2 of the y axis:
set logscale y 2
To enable z and color log axes for a pm3d plot:
set logscale zcb
To disable z axis log scaling:
unset logscale z