Waylon -- As John Evans mentioned, you can use python and the nc module
to create/manipulate netCDF files. All of our work at the Regional
Climate Centers uses the python netCDF interface.
It is available here: http://www.nrcc.cornell.edu/noon/ncmodule.html
Here is a simple python example to do what you describe below:
import nc
F = nc.open('F.nc', nc.WRITE)
X = F.var('X')
for i in range(len(X)) :
if X[i] == 32 : X[i] = 45
F.close()
This assumes that X has a single dimension.
Hope that helps.
--Bill Noon
Northeast Regional Climate Center
Cornell University
On Nov 11, 2005, at 8:32 AM, Waylon.Collins wrote:
Dear group members,
After reviewed the Unidata list of software that manipulates netCDF
files, I have yet to find one that can perform the following task -- I
need command-line software (that can run in a Redhat Enterprise Linux
environment) that will allow me to replace data values, associated
with a particular variable, with values that I can specify. It needs
to allow for a logical operation. For example, the software needs to
be able to perform the following -- "Any datum of variable X, within
netCDF file with filename F.nc, that equals 32, change it to the value
45. Thus, the original file F.nc is now altered, or the altered file
is now named G.nc". Any help will be greatly appreciated.
Sincerely,
Waylon
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