[gradsusr] gradsusr Digest, Vol 2, Issue 40

Tue Apr 27 13:13:13 EDT 2010

geeta,

Yes, you can write this output (result of 'd gr2stn....' using gxout print)
to a file, but you did not say what type of output.  A simple way to output
to a text file, for example:
outfile='c:/temp/tmpprs.dat'
'set t 1';'set x 1';'set y 1'
'set gxout print'
'set prnopts %0.2f'
ts=1
while(ts<=10)
  'd gr2stn(TMPprs(t='ts'),77.5,12.5)'
  tmp=sublin(result,3)
  rc=write(outfile,ts','tmp)
  ts=ts+1
endwhile
rc=close(outfile)

Above should produce a file (.../tmpprs.dat, in this case) with an output
similar to this, where first value is the timestep, and second value is the
interpolated value for that timestep:
1,308.80
2,311.90
3,311.30
4,307.60
5,303.90
6,301.30
7,300.50
8,302.90
9,308.20
10,311.50

You may also find this OpenGrADS Cookbook reference useful, depending on the
type of output you want:
http://cookbooks.opengrads.org/index.php?title=Recipe-002:_Saving_GrADS_variable_data_to_a_text_file

Using a Google or other web search, you should be able to come across other
useful help by specifying something like "ascii output site:gradsusr.org" to
search the User archives.

Stephen McMillan

On Tue, Apr 27, 2010 at 12:09 PM, Geeta Geeta <geeta124 at hotmail.com> wrote:

>  Dear Stephen,
> Thank you very much for all the help.
> It is plotting and also printing the TMPprs.
> Can I write this output to a file?
> I tried with fwrite but this does not seem to work.
> Kindly suggest.
>
> geeta
>
>
>
> > From: gradsusr-request at gradsusr.org
> > Subject: gradsusr Digest, Vol 2, Issue 40
> > To: gradsusr at gradsusr.org
> > Date: Tue, 27 Apr 2010 11:01:22 -0400
> >
> > Send gradsusr mailing list submissions to
> > gradsusr at gradsusr.org
> >
> > To subscribe or unsubscribe via the World Wide Web, visit
> > http://gradsusr.org/mailman/listinfo/gradsusr
> > or, via email, send a message with subject or body 'help' to
> > gradsusr-request at gradsusr.org
> >
> > You can reach the person managing the list at
> > gradsusr-owner at gradsusr.org
> >
> > When replying, please edit your Subject line so it is more specific
> > than "Re: Contents of gradsusr digest..."
> >
> >
> > Today's Topics:
> >
> > 1. Re: Gribmap (James Burn)
> > 2. Re: error with gr2stn function (Stephen McMillan)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Tue, 27 Apr 2010 09:38:50 +0100
> > From: James Burn <james at weatherbadger.com>
> > Subject: Re: [gradsusr] Gribmap
> > To: gradsusr at gradsusr.org
> > Message-ID: <201004270938.51071.james at weatherbadger.com>
> > Content-Type: text/plain; charset="iso-8859-15"
> >
> > Andrew
> > In my cron-run shell scripts I change directory to the location of the
> data
> > first before running gridmap.
> >
> > "cd $HOME/grads_etc/data "
> >
> > I've had it like this for some time, and can't remember why I did it like
>
> > this, but perhaps it was to get around the problem you've got?
> >
> > Good luck
> > James
> >
> > On Tuesday 27 April 2010 06:18:58 Andrew Revering wrote:
> > > I'm new to Linux and I'm pulling my hair out trying to figure out why
> > > gribmap will not run when executed as a cron job.
> > >
> > >
> > >
> > > In crontab I execute a .sh script that has something that looks like:
> > >
> > >
> > >
> > > #!/bin/bash
> > >
> > >
> > >
> > > /wrf/wrfems/util/grads/bin/grib2ctl.pl -verf
> > > /wrf/wrfems/runs/float/emsprd/grib/arw_0000.grib >
> > > /wrf/wrfems/runs/float/emsprd/grib/arw_0000.ctl
> > >
> > >
> > >
> > > /wrf/wrfems/util/grads/bin/gribmap -I
> > > /wrf/wrfems/runs/float/emsprd/grib/arw_0000.ctl
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > > The last line is the problem child. Note that the script is running,
> and
> > > the first line in the script (converting GRIB to a CTL file) works, but
> > > nothing happens when trying to execute the gribmap executable.
> > >
> > >
> > >
> > > Also I should note that if I type that same line in the terminal it
> DOES
> > > work, just not in crontab.
> > >
> > >
> > >
> > > Any ideas?
> >
> > --
> >
> > Reply to : james at weatherbadger.com
> > Visit http://www.weatherbadger.com for some weather forecasts.
> >
> >
> > -------------- next part --------------
> > An HTML attachment was scrubbed...
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> >
> > ------------------------------
> >
> > Message: 2
> > Date: Tue, 27 Apr 2010 11:01:13 -0400
> > From: Stephen McMillan <smcmillan at planalytics.com>
> > Subject: Re: [gradsusr] error with gr2stn function
> > To: GrADS Users Forum <gradsusr at gradsusr.org>
> > Message-ID:
> > <s2v1f726e2f1004270801u5011e3cbu4b58b50581a43120 at mail.gmail.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> >
> > Geeta,
> > Try setting or re-setting your prnopts, for example:
> > 'set gxout print'
> > 'set prnopts %0.2f'
> > 'd gr2stn(TMPprs,77.5,12.5)'
> >
> > If you still don't get a result...
> > If you display a map with x and y varying, t = 1, and lev = 1000, do you
> get
> > a sensible image of the variable tmpprs? Do you also get a reasonable
> value
> > if you don't interpolate?, for example:
> > 'd TMPprs(lon=77.5,lat=12.5)' ...should give you the same value as 'd
> > gr2stn(TMPprs,77.5,12.5)' if both are at the same data gridpoint.
> >
> > Good luck!
> > Stephen McMillan
> >
> > On Tue, Apr 27, 2010 at 1:36 AM, Geeta Geeta <geeta124 at hotmail.com>
> wrote:
> >
> > > Dear All,
> > > I have tried to fix the x and y as suggested. But I have not got the
> result
> > > . I am posting the message given by grads.
> > >
> > > ga-> reinit
> > > No hardcopy metafile open
> > > All files closed; all defined objects released
> > > All GrADS attributes have been reinitialized
> > > ga-> open 12mar2008
> > > Scanning description file: 12mar2008
> > > Data file gdas2008031200f00 is open as file 1
> > > LON set to 0 360
> > > LAT set to -90 90
> > > LEV set to 1000 1000
> > > Time values set: 2008:3:12:0 2008:3:12:0
> > > ga-> set t 1
> > > Time values set: 2008:3:12:0 2008:3:12:0
> > > ga-> set x 1
> > > LON set to 0 0
> > > ga-> set y 1
> > > LAT set to -90 -90
> > > ga-> set lev 1000
> > > LEV set to 1000 1000
> > > ga-> set gxout print
> > > ga-> d gr2stn(TMPprs,77.5,12.5)
> > > Printing Stations -- 1 Reports -- Undef = 9.999e+20
> > > xxxxxxxx 77.5 12.5 1000
> > >
> > > ga->
> > > ga-> d gr2stn(TMPprs,0.0,-90.0)
> > > Printing Stations -- 1 Reports -- Undef = 9.999e+20
> > > xxxxxxxx 0 -90 1000
> > >
> > > ga-> d gr2stn(TMPprs,50.0,-45.0)
> > > Printing Stations -- 1 Reports -- Undef = 9.999e+20
> > > xxxxxxxx 50 -45 1000
> > >
> > > ga->
> > >
> > >
> > > It is printing the lat, lon and the level only.
> > > Kindly suggest.
> > > geeta
> > >
> > >
> > >
> > > > From: gradsusr-request at gradsusr.org
> > > > Subject: gradsusr Digest, Vol 2, Issue 34
> > > > To: gradsusr at gradsusr.org
> > > > Date: Mon, 26 Apr 2010 02:46:40 -0400
> > > >
> > > > Send gradsusr mailing list submissions to
> > > > gradsusr at gradsusr.org
> > > >
> > > > To subscribe or unsubscribe via the World Wide Web, visit
> > > > http://gradsusr.org/mailman/listinfo/gradsusr
> > > > or, via email, send a message with subject or body 'help' to
> > > > gradsusr-request at gradsusr.org
> > > >
> > > > You can reach the person managing the list at
> > > > gradsusr-owner at gradsusr.org
> > > >
> > > > When replying, please edit your Subject line so it is more specific
> > > > than "Re: Contents of gradsusr digest..."
> > > >
> > > >
> > > > Today's Topics:
> > > >
> > > > 1. gr2stn function (Geeta Geeta)
> > > > 2. scorr function (Carlos Batista)
> > > > 3. Re: gr2stn function (Stephen McMillan)
> > > > 4. Re: scorr function (Stephen McMillan)
> > > > 5. Unable to read Monthly Northern Hemisphere Sea-Level Pressure
> > > > (DSS SLP Grid-binary) (zowiti at ncst.go.ke)
> > > > 6. error in gr2stn script (Geeta Geeta)
> > > >
> > > >
> > > >
> ----------------------------------------------------------------------
> > > >
> > > > Message: 1
> > > > Date: Sat, 24 Apr 2010 07:45:42 +0000
> > > > From: Geeta Geeta <geeta124 at hotmail.com>
> > > > Subject: [gradsusr] gr2stn function
> > > > To: <gradsusr at gradsusr.org>
> > > > Message-ID: <SNT117-W12B787EAD3ABD70AA641528A060 at phx.gbl>
> > > > Content-Type: text/plain; charset="iso-8859-1"
> > > >
> > > >
> > > > Dear all,
> > > > Kindly tell me how to use the "gr2stn " function of grads.
> > > > How the station data file will look like?
> > > > Any suggestions
> > > > geeta
> > > >
> > > >
> > > > _________________________________________________________________
> > > > The amazing world in sharp snaps
> > > > http://news.in.msn.com/gallery/archive.aspx
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> > > > An HTML attachment was scrubbed...
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> > > >
> > > > ------------------------------
> > > >
> > > > Message: 2
> > > > Date: Sat, 24 Apr 2010 11:02:31 -0300
> > > > From: Carlos Batista <krlosbatist at gmail.com>
> > > > Subject: [gradsusr] scorr function
> > > > To: gradsusr at gradsusr.org
> > > > Message-ID:
> > > > <y2gdd4d468f1004240702zaf186fd7ufa21b4b504df48a1 at mail.gmail.com>
> > > > Content-Type: text/plain; charset="iso-8859-1"
> > > >
> > > > Dear all,
> > > > Kindly tell me how to use the "scorr " function of grads.
> > > > I don't how use its this function for to do correlation between
> > > > precipitation and flow rivers. Someone know some gs for to do
> > > correlations
> > > > between this data, please, useding the scorr function and other
> functions
> > > ?
> > > > Any suggestions
> > > > Krlos
> > > > e-mail; krlosbatist at gmail.com
> > > > -------------- next part --------------
> > > > An HTML attachment was scrubbed...
> > > > URL:
> > >
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> > > >
> > > > ------------------------------
> > > >
> > > > Message: 3
> > > > Date: Sat, 24 Apr 2010 10:42:04 -0400
> > > > From: Stephen McMillan <smcmillan at planalytics.com>
> > > > Subject: Re: [gradsusr] gr2stn function
> > > > To: GrADS Users Forum <gradsusr at gradsusr.org>
> > > > Message-ID:
> > > > <s2u1f726e2f1004240742j1329b506kcf3e48202ec2924c at mail.gmail.com>
> > > > Content-Type: text/plain; charset="iso-8859-1"
> > > >
> > > > Dear geeta,
> > > > Please see this post on the the gradsusr archives:
> > > > http://gradsusr.org/pipermail/gradsusr/2010-March/000077.html
> > > > You can search for additional posts at
> > > > http://gradsusr.org/pipermail/gradsusr/
> > > > GrADS documentation at:
> > > http://sidata.org/grads/gadoc/gradfuncgr2stn.html
> > > >
> > > > Good luck--
> > > > Stephen McMillan
> > > >
> > > > On Sat, Apr 24, 2010 at 3:45 AM, Geeta Geeta <geeta124 at hotmail.com>
> > > wrote:
> > > >
> > > > > Dear all,
> > > > > Kindly tell me how to use the "gr2stn " function of grads.
> > > > > How the station data file will look like?
> > > > > Any suggestions
> > > > > geeta
> > > > >
> > > > >
> > > > > ------------------------------
> > > > > Catch the changing security environment Get it now.<
> > > http://news.in.msn.com/internalsecurity/>
> > > > >
> > > > > _______________________________________________
> > > > > gradsusr mailing list
> > > > > gradsusr at gradsusr.org
> > > > > http://gradsusr.org/mailman/listinfo/gradsusr
> > > > >
> > > > >
> > > >
> > > > ***************************************************
> > > > The information contained in this e-mail message
> > > > is intended only for the use of the recipient(s)
> > > > named above and may contain information that is
> > > > privileged, confidential, and/or proprietary.
> > > > If you are not the intended recipient, you may not
> > > > review, copy or distribute this message. If you have
> > > > received this communication in error, please notify
> > > > the sender immediately by e-mail, and delete the original message.
> > > > ***************************************************
> > > > -------------- next part --------------
> > > > An HTML attachment was scrubbed...
> > > > URL:
> > >
> http://gradsusr.org/pipermail/gradsusr/attachments/20100424/591f216e/attachment-0001.html
> > > >
> > > > ------------------------------
> > > >
> > > > Message: 4
> > > > Date: Sat, 24 Apr 2010 12:03:04 -0400
> > > > From: Stephen McMillan <smcmillan at planalytics.com>
> > > > Subject: Re: [gradsusr] scorr function
> > > > To: GrADS Users Forum <gradsusr at gradsusr.org>
> > > > Message-ID:
> > > > <j2m1f726e2f1004240903q63515e10pcba71b2095589713 at mail.gmail.com>
> > > > Content-Type: text/plain; charset="iso-8859-1"
> > > >
> > > > Dear Krlos,
> > > > If you haven't already, first review the correct syntax and example
> in
> > > the
> > > > GrADS Documentation Index:
> > > http://sidata.org/grads/gadoc/gradfuncscorr.html
> > > > Other functions can be found in the same Documentation Index.
> > > >
> > > > The basic idea is that you have two previously defined variables,
> whose
> > > > horizontal dimensions both include the geographical area you wish to
> > > > spatially correlate. For example, let's say you have two variables
> var1
> > > and
> > > > var2 and you wanted to correlate them over a 10 x 10 degree domain
> over
> > > > somewhere at a fixed time:
> > > > 'd scorr(var1,var2,lon=-90,lon=-80,lat=30,lat=40)'
> > > > should give you something like this:
> > > > result value = -0.2356
> > > > You could capture above value in script by including this after
> display
> > > > command:
> > > > corr=subwrd(result,4)
> > > > You can also create a time loop of correlations, 50 timesteps for
> > > example:
> > > > 'set t 1 50'
> > > > 'd tloop(scorr(var1,var2,....)'
> > > > Create a correlation time series of above loop:
> > > > 'define corrts=tloop(scorr(var1,var2,...)'
> > > > Display the time series:
> > > > 'set x 1';'set y 1'
> > > > 'd corrts'
> > > >
> > > > The tcorr function (see
> http://sidata.org/grads/gadoc/gradfunctcorr.html
> > > )
> > > > may be more appropriate for correlating your data, especially if they
> are
> > > > time series at a fixed point.
> > > >
> > > > A search of the GrADS user archive (
> > > http://gradsusr.org/pipermail/gradsusr/)
> > > > may yield more appropriate answers.
> > > >
> > > > Best wishes--
> > > > Stephen McMillan
> > > >
> > > > On Sat, Apr 24, 2010 at 10:02 AM, Carlos Batista <
> krlosbatist at gmail.com
> > > >wrote:
> > > >
> > > > > Dear all,
> > > > > Kindly tell me how to use the "scorr " function of grads.
> > > > > I don't how use its this function for to do correlation between
> > > > > precipitation and flow rivers. Someone know some gs for to do
> > > correlations
> > > > > between this data, please, useding the scorr function and other
> > > functions ?
> > > > > Any suggestions
> > > > > Krlos
> > > > > e-mail; krlosbatist at gmail.com
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > gradsusr mailing list
> > > > > gradsusr at gradsusr.org
> > > > > http://gradsusr.org/mailman/listinfo/gradsusr
> > > > >
> > > > >
> > > >
> > > > ***************************************************
> > > > The information contained in this e-mail message
> > > > is intended only for the use of the recipient(s)
> > > > named above and may contain information that is
> > > > privileged, confidential, and/or proprietary.
> > > > If you are not the intended recipient, you may not
> > > > review, copy or distribute this message. If you have
> > > > received this communication in error, please notify
> > > > the sender immediately by e-mail, and delete the original message.
> > > > ***************************************************
> > > > -------------- next part --------------
> > > > An HTML attachment was scrubbed...
> > > > URL:
> > >
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> > > >
> > > > ------------------------------
> > > >
> > > > Message: 5
> > > > Date: Sun, 25 Apr 2010 06:37:16 -0700
> > > > From: "zowiti at ncst.go.ke" <zowiti at ncst.go.ke>
> > > > Subject: [gradsusr] Unable to read Monthly Northern Hemisphere
> > > > Sea-Level Pressure (DSS SLP Grid-binary)
> > > > To: <gradsusr at gradsusr.org>
> > > > Message-ID: <4363b2a4$4cb7762b$7c5d40f6$@com>
> > > > Content-Type: text/plain; charset="iso-8859-1"
> > > >
> > > > Dear Users,
> > > > I am reading the DSS SLP [5? x 5?, 0E to 355E and 15N to 90N (72 x 16
> > > Longitude/Latitude)] data in Grads via the ctl below. When I display
> the
> > > slp, I get a distorted plot. I'm unable to figure out the problem in
> the
> > > ctl.
> > > >
> > > > dset d:\jf\molydata.bin
> > > > options sequential
> > > > undef -9999
> > > > title dss_slp
> > > > xdef 72 linear 0 5.0
> > > > ydef 15 linear 15 5.0
> > > > zdef 1 levels 1000
> > > > TDEF 1335 LINEAR jan1899 1mo
> > > > vars 1
> > > > slp 0 99 pressure
> > > > endvars
> > > > Additional data information:
> > > > 1080 binary integer data values in 15-bit bytes. Data values are to
> > > nearest tenth millibar and are the rightmost 14 bits of each byte. The
> grid
> > > of Y(I,J) is dimensioned Y(72,15). As I goes from 1 to 72, longitude
> goes
> > > from 00E-355E; as J goes from 1 to 15, latitude goes from 15N-85N.
> > > >
> > > > ZABLONE OWITI
> > > > GRADUATE STUDENT
> > > > Nanjing University of Information, Science and Technology
> > > > College of International Education
> > > >
> > > > ====================================================
> > > >
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> > > > An HTML attachment was scrubbed...
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> > >
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> > > >
> > > > ------------------------------
> > > >
> > > > Message: 6
> > > > Date: Mon, 26 Apr 2010 06:46:39 +0000
> > > > From: Geeta Geeta <geeta124 at hotmail.com>
> > > > Subject: [gradsusr] error in gr2stn script
> > > > To: grads grads <gradsusr at gradsusr.org>
> > > > Message-ID: <SNT117-W28F33B5C383D2CB799A3548A040 at phx.gbl>
> > > > Content-Type: text/plain; charset="iso-8859-1"
> > > >
> > > >
> > > > Dear All,
> > > > I am trying to use the "gr2stn " function of grads but failed. I am
> > > posting the following message from grads. My gridded data file is the
> gfs
> > > grib files.
> > > >
> > > > ga-> reinit
> > > > No hardcopy metafile open
> > > > All files closed; all defined objects released
> > > > All GrADS attributes have been reinitialized
> > > > ga-> open 12mar2008
> > > > Scanning description file: 12mar2008
> > > > Data file gdas2008031200f00 is open as file 1
> > > > LON set to 0 360
> > > > LAT set to -90 90
> > > > LEV set to 1000 1000
> > > > Time values set: 2008:3:12:0 2008:3:12:0
> > > > ga-> set t 1
> > > > Time values set: 2008:3:12:0 2008:3:12:0
> > > > ga-> set lev 1000
> > > > LEV set to 1000 1000
> > > > ga-> d gr2stn(TMP2M,77.5,12.5)
> > > > Error from GR2STN: 2nd argument must be stns
> > > > Operation Error: Error from gr2stn function
> > > > Error ocurred at column 1
> > > > DISPLAY error: Invalid expression
> > > > Expression = gr2stn(tmp2m,77.5,12.5)
> > > >
> > > >
> > > >
> > > > If I use this function with the WRF output, I get the following
> message.
> > > > ga-> reinit
> > > > No hardcopy metafile open
> > > > All files closed; all defined objects released
> > > > All GrADS attributes have been reinitialized
> > > > ga-> open test
> > > > Scanning description file: test
> > > > Data file test.dat is open as file 1
> > > > LON set to 60.2713 89.7287
> > > > LAT set to 0.57003 23.9053
> > > > LEV set to 1000 1000
> > > > Time values set: 2010:4:24:0 2010:4:24:0
> > > > ga-> set t 1
> > > > Time values set: 2010:4:24:0 2010:4:24:0
> > > > ga-> set lev 1000
> > > > LEV set to 1000 1000
> > > > ga-> d gr2stn(T2, 77.5, 12.5)
> > > > Error from GR2STN: Grid must have linear scaling
> > > > Operation Error: Error from gr2stn function
> > > > Error ocurred at column 1
> > > > DISPLAY error: Invalid expression
> > > > Expression = gr2stn(t2,77.5,12.5)
> > > > ga->
> > > >
> > > > I Think that since WRF output does not have fixed dx and dy so the
> error.
> > >
> > > >
> > > > Kindly suggest.
> > > > Geeta
> > > >
> > > >
> > > > _________________________________________________________________
> > > > Catch the latest in the world of fashion
> > > > http://lifestyle.in.msn.com/
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> > > >
> > > > ------------------------------
> > > >
> > > > _______________________________________________
> > > > gradsusr mailing list
> > > > gradsusr at gradsusr.org
> > > > http://gradsusr.org/mailman/listinfo/gradsusr
> > > >
> > > >
> > > > End of gradsusr Digest, Vol 2, Issue 34
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