Is it possible to set a z-axis scale with intervals of non-linear magnitude
in surface plots? For example, I have data that ranges for 200-9000 in the
z-scale. Defining the scale to some equal magnitude interval (like 1000)
gives me (for example) 0-1000; 1000-2000; 2000-3000; etc. I am only
interested in the upper end of the data rangefor this particular surface plot
and would prefer to see the scale non-linearly, i.e. 8100-8910; 8910-8990;
and 8990-9000.