defval ??

[Davide Sacchetti]

warriors answer ...

1) q defval works for DEFINED variables, NOT for variables described in
ctl file ... try: define uuu=ugrdprs and apply your syntax to uuu, it
should work

2) on my opinion the documentation is clear enough. Anyway if you have
more than one data file you could describe all your data by a single ctl
file using the template option.

3) The "read" command is not used for data files but for ascii files: it
returns a return code (you may wish calling it "rc") and the content of
what you have read.

Hoping to help a bit ...
Bye bye

        Davide

On Wed, 2007-02-14 at 14:03 -0900, John Papineau wrote:
> Greetings GRADS warriors-
>
> 1)   I am attempting to write a script using 'defval'.
> Specifically, I want to _retrieve a value like U wind_  (ugrdprs in
> my nomenclature) at a point. If I run:
>
> 'q defval ugrdprs 'i' 'j
>
> the following error message results:
>
>  "defined name not found"
> I
>  have tried all possible combinations of  ' around the variables, etc
> Have also tried specific grid values like 'q defval ugrdprs '30' '25
> same error message.
>
> 2) It is unclear from the documentation if I have ## number of files
> (each at a
> different time) that I want to query for specific values, such as noted
> above, do I need to use the "read" command? or just have them all open?
>
> 3)  What does "rc" stand for?  record code, if so what does it mean?
>
> Many thanks- John
--
Sacchetti Davide
ARPAL UO3 Centro Meteo Idrologico Regione Liguria - Dir. Scientifica
V.le Brigare Partigiane 2 16121 Genova (I)
tel: +39 010 6437535
mail: davide.sacchetti at arpal.org   web: www.meteoliguria.it