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Split Z axis plots.

Question:

How can I make a plot in which the vertical axis is split into
two scale factors?  (With surface waters magnified for instance).

Example:

Solution:

Note that this script will not work in a viewport since it uses viewports.

You can reproduce the grapic above with:

yes? SET DATA levitus_climatology
yes? SET WINDOW/ASPECT=1
yes? go split_z FILL "/lev=(0,4,.5)(0,30,2)" "temp[X=160W,Y=45S:45N]" 0 500 4000 0.4