Re: [ferret_users] Testing individual points within a loop

[James Caveen <james_caveen@xxxxxxxxxx>]

Hi Steve,

If what you are trying to do is plot the location of points where tlat
is between 20 and 21,  you  could do it without the repeat as follows:

yes? let slat = if (tlat gt 20) and (tlat lt 21) then tlat
yes?plot/vs/color=black/size=0.25/thick=2/i=1:50 jlon,slat

Regards,

James


-- 
James Caveen
Programmeur-Analyste
Université du Québec à Rimouski

Tel:   (418) 723-1986, poste 1295
Courriel: james_caveen@uqar.qc.ca

--- Begin Message ---

• To: ferret_users@xxxxxxxx
• Subject: [ferret_users] Testing individual points within a loop
• From: Steve Guimond <guimond@xxxxxxxxxxxxx>
• Date: Wed, 21 Sep 2005 2:11:25 EDT
• Organization: COAPS
• Reply-to: Steve Guimond <guimond@xxxxxxxxxxxxx>
• Sender: owner-ferret_users@xxxxxxxxxxxxx

Ferret Clan:
   I am running into an error when I execute the code below.  I want to
loop through my data points and when one of them meets a certain
condition (if statement), plot that point and continue looping.  There is 
an error with how I use the variable "a" however, I believe I have the
proper parenthesis, or bracket listed.  

repeat/range=1:50:1/name=a (set data 1;IF `tlat[i=`a`] gt 20.0 and
tlat[i=`a`] lt 21.0` THEN
(plot/vs/size=0.25/color=black/thick=2/nolab/over
jlon[i=`a`],tlat[i=`a`]) ENDIF)
 
**ERROR: command syntax: tlat[i=
          unclosed quotation, parenthesis, or bracket

Thanks for any help.

Steve

*****************************************
Stephen R. Guimond
Graduate Research Assistant
Center for Ocean-Atmospheric Prediction Studies 
*****************************************

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