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the simplest way is to redirect shell output to a file (!date >/tmp/x),
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then read it (<a href="http://cola.gmu.edu/grads/gadoc/script.html">http://cola.gmu.edu/grads/gadoc/script.html</a>)
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<br>
in opengrads there is at least one extension (I wrote one) that gets
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the output of external commands, but if you don't know about extensions
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the first solution may be faster to implement
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<br>
Bye bye
<br>
Davide
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On Mon, 2020-10-19 at 17:26 -0400, Muthuvel Chelliah - NOAA Federal
<br>
wrote:
<br>
<font color="#000000">> Semyon, Jeff,
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">> Thanks for the replies.
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">> a) I know that the date command with the options I had asked, will
</font><br>
<font color="#000000">> give the
</font><br>
<font color="#000000">> result at the grads command line with a ! before that command.
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">> b) I also know the second round about way my manipulating the output
</font><br>
<font color="#000000">> from the q time output (but how to do few days ago?).
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">> I was only curious if there was a way from a) above, of possibly
</font><br>
<font color="#000000">> storing
</font><br>
<font color="#000000">> that output in a variable as part of a grads script variable itself.
</font><br>
<font color="#000000">> I guess, it is difficult, and not doable!!
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">> Thanks again
</font><br>
<font color="#000000">> Muthu
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">> ------------------------------------------------
</font><br>
<font color="#000000">> Dr. Muthuvel Chelliah, eMail: <a href="mailto:Muthuvel.Chelliah@noaa.gov">Muthuvel.Chelliah@noaa.gov</a>
</font><br>
<font color="#000000">> Rm. 3008, Climate Prediction Center, Ph: (301) 683-3393
</font><br>
<font color="#000000">> NCEP/NWS/NOAA/U.S.Dept.of Commerce,
</font><br>
<font color="#000000">> 5830, University Research Court, NCWCP,
</font><br>
<font color="#000000">> College Park, MD 20740
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">>
</font><br>
<font color="#000000">> On Mon, Oct 19, 2020 at 4:54 PM Jeff Duda <<a href="mailto:jeffduda319@gmail.com">jeffduda319@gmail.com</a>>
</font><br>
<font color="#000000">> wrote:
</font><br>
<font color="#000000">> > You can try prompting the linux command with "!" and hopefully the
</font><br>
<font color="#000000">> > script recognizes the result and stores it properly.
</font><br>
<font color="#000000">> >
</font><br>
<font color="#000000">> > I see that you're attempting to do something that would require
</font><br>
<font color="#000000">> > lots of code in a grads script, but hopefully you know that you can
</font><br>
<font color="#000000">> > query the valid time of data using 'q time' and parse the data
</font><br>
<font color="#000000">> > using the 'sublin()', 'subwrd()', and 'substr()' functions internal
</font><br>
<font color="#000000">> > to GrADS' scripting language.
</font><br>
<font color="#000000">> >
</font><br>
<font color="#000000">> > Jeff Duda
</font><br>
<font color="#000000">> >
</font><br>
<font color="#000000">> > On Mon, Oct 19, 2020 at 1:56 PM Muthuvel Chelliah - NOAA Federal <
</font><br>
<font color="#000000">> > <a href="mailto:muthuvel.chelliah@noaa.gov">muthuvel.chelliah@noaa.gov</a>> wrote:
</font><br>
<font color="#000000">> > > Hello folks,
</font><br>
<font color="#000000">> > >
</font><br>
<font color="#000000">> > > How can I set the result of the following linux shell command
</font><br>
<font color="#000000">> > > to a variable (time_var) within a Cola grads script? which can be
</font><br>
<font color="#000000">> > > assigned
</font><br>
<font color="#000000">> > > to set time command, via 'set time 'time_var
</font><br>
<font color="#000000">> > >
</font><br>
<font color="#000000">> > > date -d "3 days ago" +%d%b%Y
</font><br>
<font color="#000000">> > >
</font><br>
<font color="#000000">> > > Thanks
</font><br>
<font color="#000000">> > > Muthu
</font><br>
<font color="#000000">> > > ------------------------------------------------
</font><br>
<font color="#000000">> > > Dr. Muthuvel Chelliah, eMail: <a href="mailto:Muthuvel.Chelliah@noaa.gov">Muthuvel.Chelliah@noaa.gov</a>
</font><br>
<font color="#000000">> > > Rm. 3008, Climate Prediction Center, Ph: (301) 683-3393
</font><br>
<font color="#000000">> > > NCEP/NWS/NOAA/U.S.Dept.of Commerce,
</font><br>
<font color="#000000">> > > 5830, University Research Court, NCWCP,
</font><br>
<font color="#000000">> > > College Park, MD 20740
</font><br>
<font color="#000000">> > > _______________________________________________
</font><br>
<font color="#000000">> > > gradsusr mailing list
</font><br>
<font color="#000000">> > > <a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>
</font><br>
<font color="#000000">> > > <a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a>
</font><br>
<font color="#000000">> >
</font><br>
<font color="#000000">> >
</font><br>
<font color="#000000">> > _______________________________________________
</font><br>
<font color="#000000">> > gradsusr mailing list
</font><br>
<font color="#000000">> > <a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>
</font><br>
<font color="#000000">> > <a href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a>
</font><br>
<br>
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