Stephen McMillan<br><br>Ok, Thank's for help!!!<br><br>Carlos Batista<br><br><br><div class="gmail_quote">2010/4/24 Stephen McMillan <span dir="ltr"><<a href="mailto:smcmillan@planalytics.com">smcmillan@planalytics.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div>Dear Krlos,</div>
<div>If you haven't already, first review the correct syntax and example in the GrADS Documentation Index: <a href="http://sidata.org/grads/gadoc/gradfuncscorr.html" target="_blank">http://sidata.org/grads/gadoc/gradfuncscorr.html</a><br>
Other functions can be found in the same Documentation Index.</div>
<div> </div>
<div>The basic idea is that you have two previously defined variables, whose horizontal dimensions both include the geographical area you wish to spatially correlate. For example, let's say you have two variables var1 and var2 and you wanted to correlate them over a 10 x 10 degree domain over somewhere at a fixed time:</div>
<div>'d scorr(var1,var2,lon=-90,lon=-80,lat=30,lat=40)'</div>
<div>should give you something like this:</div>
<div>result value = -0.2356</div>
<div>You could capture above value in script by including this after display command:</div>
<div>corr=subwrd(result,4)</div>
<div>You can also create a time loop of correlations, 50 timesteps for example:</div>
<div>'set t 1 50'</div>
<div>'d tloop(scorr(var1,var2,....)'</div>
<div>Create a correlation time series of above loop:</div>
<div>'define corrts=tloop(scorr(var1,var2,...)'</div>
<div>Display the time series:</div>
<div>'set x 1';'set y 1'</div>
<div>'d corrts'</div>
<div> </div>
<div>The tcorr function (see <a href="http://sidata.org/grads/gadoc/gradfunctcorr.html" target="_blank">http://sidata.org/grads/gadoc/gradfunctcorr.html</a>) may be more appropriate for correlating your data, especially if they are time series at a fixed point.</div>
<div> </div>
<div>A search of the GrADS user archive (<a href="http://gradsusr.org/pipermail/gradsusr/" target="_blank">http://gradsusr.org/pipermail/gradsusr/</a>) may yield more appropriate answers.</div>
<div> </div>
<div>Best wishes--</div>
<div>Stephen McMillan</div><div><div></div><div class="h5">
<div> </div>
<div>On Sat, Apr 24, 2010 at 10:02 AM, Carlos Batista <span dir="ltr"><<a href="mailto:krlosbatist@gmail.com" target="_blank">krlosbatist@gmail.com</a>></span> wrote:<br></div>
</div></div><div class="gmail_quote">
<blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;" class="gmail_quote"><div><div></div><div class="h5">Dear all,<br>Kindly tell me how to use the "scorr " function of grads.<br>
I don't how use its this function for to do correlation between precipitation and flow rivers. Someone know some gs for to do correlations between this data, please, useding the scorr function and other functions ?<br>
Any suggestions<br>Krlos<br>e-mail; <a href="mailto:krlosbatist@gmail.com" target="_blank">krlosbatist@gmail.com</a><br><br><br></div></div>_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org" target="_blank">gradsusr@gradsusr.org</a><br>
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