[gradsusr] gradsusr Digest, Vol 45, Issue 10

[Jennifer Adams]

On Nov 8, 2013, at 1:21 PM, Mayes, Fred wrote:

> I did a query.  If I understand how GrADS works, the variables are:
> Ps
> Ua
> Va
> Zg
> Ta
> Hus
> Ts
> Pr
So 'z' is not a variable in your file, that is why you got that error message. Try  ' d zg ' instead.

> 
> I assume that "z" was the vertical level (e.g., 100, 200, 250, etc.).
Grads stores the grid values in internal variables called 'lon', 'lat', and 'lev'. 

>  zg is not the same, is it?  
No, zg is a data variable. 

--Jennifer


> 
> Fred M.
> 
> -----Original Message-----
> From: gradsusr-bounces at gradsusr.org [mailto:gradsusr-bounces at gradsusr.org] On Behalf Of gradsusr-request at gradsusr.org
> Sent: Friday, November 08, 2013 12:00 PM
> To: gradsusr at gradsusr.org
> Subject: gradsusr Digest, Vol 45, Issue 10
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> Today's Topics:
> 
>   1. skew-t Plot (Mehdi Alijahan)
>   2. Re: Tutorial assistance (Jennifer Adams)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Thu, 7 Nov 2013 14:16:11 -0800 (PST)
> From: Mehdi Alijahan <mehdi_alijahan at yahoo.com>
> Subject: [gradsusr] skew-t Plot
> To: "gradsusr at gradsusr.org" <gradsusr at gradsusr.org>
> Message-ID:
> 	<1383862571.83374.YahooMailNeo at web122602.mail.ne1.yahoo.com>
> Content-Type: text/plain; charset="iso-8859-1"
> 
> Dear all
> Good time
> I want draw skew-t plot for 32.5 lat, 48.5 lon, 18z1aug2012 and 1000 100 hpa lev.
> please help me step by step from open data until draw plot.
> 
> thank you so much
> mehdi aalijahan
> ?
> 
> 
> Mehdi Aalijahan
> PHD Student at Mohaghegh Ardabili Univercity Physical Geography Climatology Synoptic Climatology field
> 
> Ardabil
> 
> Iran
> Tell:+98 914 153 7798
> Email Address:?
> mehdi_alijahan at yahoo.com
> mehdi.alijahan at gmail.com
> 
> mehdi.alijahan at modares.ac.irm.alijahan@uma.ac.ir
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> ------------------------------
> 
> Message: 2
> Date: Fri, 8 Nov 2013 11:17:12 -0500
> From: Jennifer Adams <jma at cola.iges.org>
> Subject: Re: [gradsusr] Tutorial assistance
> To: GrADS Users Forum <gradsusr at gradsusr.org>
> Message-ID: <FDC50A83-0B1E-4F69-8F71-A273778C003A at cola.iges.org>
> Content-Type: text/plain; charset="windows-1252"
> 
> Hi, Fred -- 
> 
> On Nov 8, 2013, at 10:44 AM, Mayes, Fred wrote:
> 
>> I am attempting to go through the tutorial for the Windows version of 
>> GrADS, http://ieges.org/grads/gadoc/tutorial.html .  I performed the 
>> operations
>> 
>> clear
>> set lon -90
>> set lat   40
>> set lev 500
>> set t 1
>> 
>> on the data set model.ctl. In doing so, I received back after the ?set 
>> lat 40? command the statement, ?LAT set to 42 42?.  Is this to be expected?
> The grid in model.ctl is very coarse. When you request a latitude or longitude that does not exactly match the center of a grid point, it sets the dimension to the lat/lon closest to your request. The message it returns is to let you know what that lat/lon actually is. 
> 
>> 
>> After this, I gave the command ?d z? and received back an ?Invalid Operand? notice that ?z not a variable or function name.?
> If you issue a 'q file' command, GrADS will show you the list of variables in your file. Is 'z' in that list? 
> 
> --Jennifer
> 
> 
>> Please advise.  Thanks.
>> 
>> Fred Mayes
>> Senior Technology  Analyst,
>>   Electricity, Coal,  Nuclear and Renewables Office Energy 
>> Information Administration
>> 1000 Independence Ave., SW   EI-34
>> Washington, DC  20585
>> (202) 586-1508 (W)
>> 
>> _______________________________________________
>> gradsusr mailing list
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> 
> --
> Jennifer M. Adams
> Center for Ocean-Land-Atmosphere Studies (COLA)
> 111 Research Hall, Mail Stop 2B3
> George Mason University
> 4400 University Drive
> Fairfax, VA 22030 
> 
> 
> 
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--
Jennifer M. Adams
Center for Ocean-Land-Atmosphere Studies (COLA)
111 Research Hall, Mail Stop 2B3
George Mason University
4400 University Drive
Fairfax, VA 22030 





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