How do you change to an ordinate on gsplot?

[Robert A. Macy]

How do you change to an ordinate "scale" in gsplot?
I'm not mathematical, so I may be using the wrong terms, 
but what I mean is:
Given a two dimensional array of real values,
the line...

>> gsplot values;

...something automatically makes a great 2d mesh plot
with x = rowsofvalues and y = columnsofvalues 
and z = values

I want y to be transformed to a different "scale".

I have specific values for the scale.  The values are not
uniform. so the mesh display has "sawtooth" like artifacts.
 How do I change the y to be a function of indices?

Stated another way.  

How do I 2d mesh plot an array with x = index of rows 
and y = monotonic function ( index of columns ) ??

                  - Robert -



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