[gradsusr] Error from GR2STN

[Athanasios Karagiannidis]

Dear Stephen thank you for yor reply.

I believe that the problem that i do not understand how (and why) to fix x and y. I set z and t at a specific value, but i do not understand why to fix x and y.
I have a grid of one surface variable and want to extract the value of the variable at 10 different station sites. Can i use the GR2STN at the 10 sites? And if i can, how do i fix x and y, as you mentioned?

Athanasios

Athanasios F. Karagiannidis
Physicist, PhD Meteorology and Climatology
E-mail: thankar at live.com

Date: Fri, 11 Oct 2013 09:25:53 -0400
From: smcmillan at planalytics.com
To: gradsusr at gradsusr.org
Subject: Re: [gradsusr] Error from GR2STN

Athanasios,
You did not provide set up/dimension information, but be sure both x and y are fixed before doing the command.  Also, if time is fixed, use 'set gxout print' and 'set prnopts...' so it will display properly.
For more information, please see documentation and examples at http://grads.iges.org/grads/gadoc/gradfuncgr2stn.html .

Good luck--Stephen McMillan


On Fri, Oct 11, 2013 at 7:40 AM, Athanasios Karagiannidis <thankar at live.com> wrote:




Hello to all. 
I'm trying to use GR2STN, but i get the following error:

Error from GR2STN: 2nd argument is not a station expression
Operation Error:  Error from gr2stn function

  Error ocurred at column 1
DISPLAY error:  Invalid expression 
  Expression = gr2stn(tmp2m,21,21)


Could anyone help?

Thanx in advance.


Athanasios F. Karagiannidis
Physicist, PhD Meteorology and Climatology

E-mail: thankar at live.com 		 	   		  

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