[gradsusr] Getting date and run from filename

[Brian Gaze]

Hi,

Using GrADS script is there a way (perhaps using substr) of returning part
of the open filename to a variable?

For example, I have opened the .ctl file which relates to this file:

pgbf.01.2013092406.201309.avrg.grib.06Z.grb2

I would like to extract the '201309' and '06Z' parts of the string to
variables.

I'm familiar with using something like:

q time
res=subwrd(result,3)
....etc

but can't see how to do something similar querying the filename of the grb2
file rather than time.

Thanks

Brian
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