[gradsusr] g2ctl/gribmap and 6hr/12hr GFS

[Charles Seman - NOAA Federal]

Christopher,

A way to do this is with indexing into a pre-defined "tindex" variable 
to define the trecord variable using the loop index.

As an example:

tindex = '1 2 3 5 7 10 12 15 18 21'
i=1
while( i<=10 )
  trecord = subwrd(tindex,i)
  say 'i, trecord = 'i', 'trecord
  i=i+1
endwhile

Another way, where you don't have to know the length of "tindex" (number 
of time levels):

i=1
trecord = subwrd(tindex,i)
while( trecord != '' )
  say 'i, trecord = 'i', 'trecord
  i=i+1
  trecord = subwrd(tindex,i)
endwhile

Try out the above code in GrADS using test.gs (attached).

Hope this helps,
Chuck

On 11/07/2015 09:52 AM, Christopher Gilroy wrote:
> I've always been curious for those who run their plots using scripting
> approaches and download in 3 or 6-hour increments, how do you handle
> past hour 240?
>
> For example, downloading 6hr files, starting at hr 0, t41=240 and then
> t43=252 and I'm curious if there's a way to make t42=252, t43=264, etc.
> I'm just looking for a way to make every t = a working timestep.
>
> So as an example, if you made a looping grads script for all 384 hours,
> using 6h files the only way I knew of to "get around" the 2 t-step
> increments after 240 was doing something like:
>
> i=1
> while (i <= 65)
>
> if (i <= 41)
> trecord=i
> endif
> if (i=42)
> trecord = 43
> endif
> if (i=43)
> trecord = 45
> endif
>
> 'd tmp2m'
>
> The only reason I cared to do that even was because otherwise every
> other image past hr240 would be blank since there is no t=42, t=44, etc.
>
>
> _______________________________________________
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>

-- 

Please note that Charles.Seman at noaa.gov should be considered my NOAA
email address, not cjs at gfdl.noaa.gov.

********************************************************************
  Charles Seman                                Charles.Seman at noaa.gov
  U.S. Department of Commerce / NOAA / OAR
  Geophysical Fluid Dynamics Laboratory         voice: (609) 452-6547
  201 Forrestal Road                              fax: (609) 987-5063
  Princeton, NJ  08540-6649            http://www.gfdl.noaa.gov/~cjs/
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the United States Department of Commerce, or NOAA."
-------------- next part --------------
function test()

tindex = '1 2 3 5 7 10 12 15 18 21'

say 'method 1'
i=1
while( i<=10 )
 trecord = subwrd(tindex,i)
 say 'i, trecord = 'i', 'trecord
 i=i+1
endwhile

say 'method 2'
i=1
trecord = subwrd(tindex,i)
while( trecord != '' )
 say 'i, trecord = 'i', 'trecord
 i=i+1
 trecord = subwrd(tindex,i)
endwhile

return