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<div class="moz-cite-prefix">Jeff,<br>
<br>
Thanks. The second trick works well.<br>
<br>
Haibin<br>
<br>
On 8/7/2012 12:39 PM, Jeff Duda wrote:<br>
</div>
<blockquote
cite="mid:CAAig09B_4y2NRqM7ugj7dPizpJGcwGnVcS=MhidCNUoahy5kqg@mail.gmail.com"
type="cite">So you want to plot the difference between a given
variable at time t and the same variable at time t-1 for a range
of time values? If so, then set your time dimension to encompass
the entire period, then display:<br>
<br>
'd var - var(t-1)'<br>
<br>
if Grads gives you any guff over that, try enclosing the
expression in a tloop() function:<br>
<br>
'd tloop(var-var(t-1))'<br>
<br>
Jeff Duda<br>
<br>
<div class="gmail_quote">On Tue, Aug 7, 2012 at 10:57 AM, Haibin
Li <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:hli@envsci.rutgers.edu" target="_blank">hli@envsci.rutgers.edu</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hello there,<br>
<br>
I have a time series for a given geographic location, now I
want to plot<br>
a time series map for the delta T, i.e.,<br>
Var(t=2)-Var(t=1),Var(t=3)-Var(t=2), ...,
Var(t=end)-Var(t=end-1).<br>
Does anyone know what command I can use to achieve that
purpose?<br>
Thanks.<br>
<br>
<br>
Haibin<br>
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</blockquote>
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<br>
<br clear="all">
<br>
-- <br>
Jeff Duda<br>
Graduate research assistant<br>
University of Oklahoma School of Meteorology<br>
Center for Analysis and Prediction of Storms<br>
<br>
<br>
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