Contour Plot of Nongeographical Data

Hello,

Is there a good example of how to use
gsn_csm_contour to make a color filled
contour plot of nongeographical data
(no lat,lon coordinates) ?

The examples I have seen are either
lat,lon or lev,lat, etc.

I am able to make contour plots with the
x,y axes being the indices of the pixel
and scanlines (the EOS example).

Am I able to define coordinate variables
which are not lat,lon,lev, via the
  var!0 = "y"
  var&y = y
syntax for example ?

If so, can I also define nongeographic
2D coordinate variable arrays, such as
is done with lat2d,lon2d examples I have
seen ?

Thanks, Bruce

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