Liping,<br>You could try templating the files using CHSUB:<br><br><a href="http://grads.iges.org/grads/gadoc/descriptorfile.html#CHSUB">http://grads.iges.org/grads/gadoc/descriptorfile.html#CHSUB</a><br><br>Jeff Duda<br><br>
<div class="gmail_quote">On Tue, May 18, 2010 at 5:32 AM, Liping Liu <span dir="ltr"><<a href="mailto:liping_liuwang@hotmail.com">liping_liuwang@hotmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
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Thanks for the answers to my previous question. The "parea" and "vpage" commands work, but I have to specify the picture size every time. I want a more robotic (generic) approach, if possible. <br>The GrADS template data descriptor is a wonderful idea! But does it only do aggregating or concatenating? I want to manipulate the fields before I plot out the hovmollers: <br>
First I plot the hovmoller using data from file 1 for Aug10-15: <br>'set yflip on'<br>'set lev 1000'<br>'set tlsupp year'<br>'set t 2 48'<br>'set lat 15'<br>'set gxout shaded'<br>
'set grads off'<br>'d ave(olr.1,lat=5,lat=25)'<br>Then I want to add the hovmoller plot using data from file 1 and file 2 for Aug15-20: <br>'set t 49 80'<br>'d ave((olr.1+olr.2)/2,lat=5,lat=25)'<br>
<br>Question: Is it possible that I write the fields (olr) from different data files (with different ctl files) into one data file with one ctl file? <br><br>Thanks!<br><br>Liping<br><br><br>> Date: Wed, 12 May 2010 18:10:26 -0400<br>
> From: <a href="mailto:Charles.Seman@noaa.gov" target="_blank">Charles.Seman@noaa.gov</a><br>> To: <a href="mailto:gradsusr@gradsusr.org" target="_blank">gradsusr@gradsusr.org</a><br>> Subject: Re: [gradsusr] plotting time in hovmoller pictures<br>
> <br>> Liping Liu,<br>> <br>> You might also be able to use GrADS templates to "concatenate" the "olr" <br>> fields from file 1 and file 2 into a single time series within GrADS as <br>
> follows:<br>> <br>> 'open olr_template.ctl'<br>> 'set yflip on'<br>> 'set lev 1000'<br>> 'set tlsupp year'<br>> 'set t 2 80'<br>> 'set lat 15'<br>> 'set gxout shaded'<br>
> 'set grads off'<br>> 'd ave(olr,lat=5,lat=25)'<br>> <br>> where "olr" is the name of the variable in the "vars" section of the <br>> GrADS template data descriptor file "olr_template.ctl" (please see the <br>
> examples at <a href="http://grads.iges.org/grads/gadoc/templates.html" target="_blank">http://grads.iges.org/grads/gadoc/templates.html</a> which can <br>> give you some ideas for what your "olr_template.ctl" might need)... <br>
> briefly, a template data descriptor file for time differs from a single <br>> dataset data descriptor file in the "dset" record, a required "options <br>> template" record, and in the "tdef" record (in which the number of time <br>
> levels in the template data descriptor file is the sum of the time <br>> levels for each of the component datasets).<br>> <br>> I hope this helps,<br>> Chuck<br>> <br>> Liping Liu wrote:<br>> > Hi, (I am a new user of GrADs)<br>
> ><br>> > I am trying to plot two hovmollers into one figure. The problem is the <br>> > time.<br>> > First I plot the hovmollers using data from file 1 for Aug10 to Aug15, <br>> > with the following commands:<br>
> ><br>> > 'set yflip on'<br>> > 'set lev 1000'<br>> > 'set tlsupp year'<br>> > 'set t 2 48'<br>> > 'set lat 15'<br>> > 'set gxout shaded'<br>
> > 'set grads off'<br>> > 'd ave(olr.1,lat=5,lat=25)'<br>> ><br>> > So it gives me a figure for Aug10--Aug15. But, when I repeat the <br>> > plotting for another period of time Aug15-Aug20: <br>
> ><br>> > 'set t 49 80'<br>> > 'd ave(olr.2,lat=5,lat=25)'<br>> ><br>> > It will simply overlap the whole figure, the time is not sequenced.<br>> ><br>> > Question: what do I do to get the pictures of Aug10-15 and Aug15-20 <br>
> > laid out vertically (not overlapping each other)?<br>> ><br>> > An alternative way is to write the two sets of data into one data <br>> > file. But I don't know how to do that either.<br>> ><br>
> > Thanks for your help. Suggestions to either of the approaches are <br>> > greatly appreciated!<br>> ><br>> > Liping<br>> > <br>> ><br>> > ------------------------------------------------------------------------<br>
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> ><br>> > ------------------------------------------------------------------------<br>> ><br>> > _______________________________________________<br>> > gradsusr mailing list<br>> > <a href="mailto:gradsusr@gradsusr.org" target="_blank">gradsusr@gradsusr.org</a><br>
> > <a href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><br>> > <br>> <br>> -- <br>> <br>> Please note that <a href="mailto:Charles.Seman@noaa.gov" target="_blank">Charles.Seman@noaa.gov</a> should be considered my NOAA<br>
> email address, not <a href="mailto:cjs@gfdl.noaa.gov" target="_blank">cjs@gfdl.noaa.gov</a>.<br>> <br>> ********************************************************************<br>> Charles Seman <a href="mailto:Charles.Seman@noaa.gov" target="_blank">Charles.Seman@noaa.gov</a><br>
> U.S. Department of Commerce / NOAA / OAR<br>> Geophysical Fluid Dynamics Laboratory voice: (609) 452-6547<br>> 201 Forrestal Road fax: (609) 987-5063<br>> Princeton, NJ 08540-6649 <a href="http://www.gfdl.noaa.gov/%7Ecjs/" target="_blank">http://www.gfdl.noaa.gov/~cjs/</a><br>
> ********************************************************************<br>> <br>> "The contents of this message are mine personally and do not reflect any<br>> official or unofficial position of the United States Federal Government,<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Iowa State University<br>Meteorology Graduate Student<br>3134 Agronomy Hall<br><a href="http://www.meteor.iastate.edu/~jdduda">www.meteor.iastate.edu/~jdduda</a><br>