[gradsusr] bash command in gs, capture the result

[Becker, Bernd]

Have a look here :
 
http://opengrads.org/doc/udxt/env/


--
Bernd Becker   Climate Impacts Product Development
Met Office Hadley Centre    FitzRoy Road  Exeter   Devon EX1 3PB  United
Kingdom
Tel.: +44 (0) 1392 884511 Fax: +44 (0)870 900 5050
E-mail:bernd.becker at metoffice.gov.uk -
http://www.metoffice.gov.uk/research/our-scientists/seasonal-to-decadal/
bernd-becker
http://www.metoffice.gov.uk/news/releases/archive/2011/weather-game

-----Original Message-----
From: gradsusr-bounces at gradsusr.org
[mailto:gradsusr-bounces at gradsusr.org] On Behalf Of claudiomet
Sent: 04 July 2012 23:17
To: GrADS Users Forum
Subject: [gradsusr] bash command in gs, capture the result

Hi Users !

I need to execute a bash command inside of a grads script the result of
this bash command must be a grads script variable for example (an stupid
example):
-------------
'open file.ctl'
'set lat -30'
'set lon -69'
'set t 2'
'd t2'; tempkelvin=subwrd(result,4)
* the line below is Bash on grads script, it starts with exclamation
'!let celsius='tempkelvin'-273; echo ${celsius}'
--------------
Stupid example but, and I need to capture the ${celsius} Bash variable
for use in the grads script.
I don't know how to make it without using an intermediate text file, the
use of a text file is extremely slow for my purposes.
Best regards!
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