skipping time

[Stephen R McMillan]

Herbert,
You could also try using the "skip" command. Perhaps something like this 
will also work for you:

set time 00z01jun2007 00z01jul2007
set missconn on   (if connecting lines desired, as Mike suggested)
d skip(air,4)

Above should display data only at 00z timesteps (assuming 4x daily as in 
your sample).

Stephen McMillan



Mike Bosilovich <mike.bosilovich at GMAIL.COM> 
Sent by: GRADSUSR at LIST.CINECA.IT
07/03/2008 11:24 AM
Please respond to
GRADSUSR at LIST.CINECA.IT


To
GRADSUSR at LIST.CINECA.IT
cc

Subject
Re: skipping time






I came up with a way to do this. It is not elegant, but works, and I would 
be happy to see another option. The idea is to maskout all other times 
except the one you want to plot. However, grads won't let you take a 
single time variable, and expand that into a time series so that it can 
mask the other times. So, here goes, for 00Z:

set time 18Z1Jul2004 00Z2Jul2004
define m1=1
set time 00Z2Jul2004 06Z2Jul2004
define m2=1
set time 00Z2Jul2004 18Z2jul2004
define m3=m2*m1                         *m3=1 at 00Z2Jul, undef all others
modify m3 diurnal                          * now m3=1 for all 00Z

set time 00Z1Jul2004 18Z31jul2004
display var*m3                               

The display should have a time series of 00Z points. If you want those 
points connected then prior to display, set missconn on.

Hope it helps,

Mike

On Thu, Jul 3, 2008 at 3:28 AM, Maat, Herbert ter <Herbert.termaat at wur.nl> 
wrote:
Dear GrADS-users,
 
I have a very simple question which is probably easy to answer as well. 
 
I have temperature data in a timeseries of, let's say, 120 timesteps (30 
days times 4 points per day; 00z 06z 12z and 18z). Using GrADS I want to 
display a selection of this data, namely only temperature at 00Z and 
skipping the other timesteps, thus display times 1, 4, 9, and so on. Is 
there a simple statement to do this in GrADS or do I need to end up 
writing a script for this?
 
Kind regards,
Herbert ter Maat





***************************************************
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/20080703/6316cdb5/attachment.html