jiming,
this web site will show you examples of reading and writing different formats.
it should get you started on reading in your ascii data and converting it
to netcdf.
http://www.cgd.ucar.edu/csm/support/NCL/io_ex.shtml
since your data is random, you are going to have to interpolate it to a
regular grid if you want a contour plot.
NCL has several routines for interpolating random data to a regular grid:
You can review this at:
http://ngwww.ucar.edu/ngdoc/ng/ref/ncl/NclFuncsAndProcs.html#InterpolationFuncti
ons
******************************************************
Sylvia Murphy EML: murphys AT ucar.edu
NCAR CGD/CAS PHN: 303-497-1720
1850 Table Mesa Dr FAX: 303-497-1333
Boulder, CO 80305
WEB: http://www.cgd.ucar.edu/csm/support/
http://www.cgd.ucar.edu/csm/support/CSM_Graphics/
******************************************************
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