<div dir="ltr"><div><div><div><div><div><div><div>Dear Latif<br></div>You can think the work in the following way:<br></div>1) Try to fix out the longitude and latitude of the two boxes viz., Box 1 (lon=x1,lon=x2, lat=y1,lat=y2) and Box 2 (lon=x3,lon=x3, lat=y3,lat=y4).<br></div>2) Now use maskout function in grads to extract the variable from the two boxes; var_box1 and var_box2 (say)<br></div>3) Now apply normal formula of correlation on var_box1 and var_box2.<br><br></div>for masking you need some mask parameter in your dataset. Otherwise you can take help of cdo. As of my understanding it can easily be done with cdo.<br></div>Hope this will help you.<br><br></div><div>Regards<br></div>Suman<br><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div><i><font style="background-color:rgb(255,153,0)"><span style="background-color:rgb(255,255,255)"><font face="comic sans ms,sans-serif"><b><font size="4">*******************************************************<br>Suman Maity</font></b></font></span></font></i></div><div><font size="1"><font style="background-color:rgb(255,153,0)"><font size="4"><span style="background-color:rgb(255,255,255)"><font face="comic sans ms,sans-serif">Research Scholar<br></font></span></font></font></font></div><div><font size="1"><font style="background-color:rgb(255,153,0)"><font size="4"><span style="background-color:rgb(255,255,255)"><font face="comic sans ms,sans-serif">Center for Ocean, Rivers, Atmosphere and Land Sciences(CORAL)<br></font></span></font></font></font></div><div><font size="1"><font style="background-color:rgb(255,153,0)"><font size="4"><span style="background-color:rgb(255,255,255)"><font face="comic sans ms,sans-serif">Indian Institute Of Technology Kharagpur.<br></font></span></font></font></font></div><div><i><b><font style="font-family:comic sans ms,sans-serif" size="4">******************************************************</font></b><b style="font-family:comic sans ms,sans-serif"><font size="4"> </font></b></i><br></div><div style="text-align:left"><i><font color="#3366ff" size="1"><span style="font-size:12pt;font-family:'Times New Roman','serif'">
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_______________________________________________________________________________________________________<br><div class="gmail_quote">On Sat, Dec 26, 2015 at 11:09 PM, Muhammad Latif <span dir="ltr"><<a href="mailto:latif.met@gmail.com" target="_blank">latif.met@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Yes Kishore<code></code>, the spatial resolution is same for both the datasets. But the function (scorr) you have mentioned is valid only for one box (I have four lat. and four lon. values, which are required to draw two boxes). Please share, If you have any idea.<br><br></div><div>Thanks <br></div><div><br></div><div>Regards <br></div></div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Dec 26, 2015 at 10:15 PM, Kishore Ragi <span dir="ltr"><<a href="mailto:kishoreragi@gmail.com" target="_blank">kishoreragi@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div><div><div>you need to have same resolution for both the datasets so that you can calculate the spatial correlation as below<br><br></div><div>open two datasets as 1 and two and invoke the following command<br></div><div><br></div><code>scorr(<i>var.1, var.2</i>, lon=x1, lon=x2, lat=y1, lat=y2)<br><br></code></div><code>hope this helps!<br><br></code></div><code>Regards,<br></code></div><code>Kishore<br></code></div><div class="gmail_extra"><br clear="all"><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><font size="4"><span style="color:rgb(0,0,0)"><b><span style="background-color:rgb(255,255,255)"></span></b></span></font></div><div><font size="2"><span style="color:rgb(0,0,0)"><b><span style="background-color:rgb(255,255,255)">PhD student in climate science,<br></span></b></span></font></div><div><font size="2"><span style="color:rgb(0,0,0)"><b><span style="background-color:rgb(255,255,255)">National Institute of Technology, Rourkela,<br></span></b></span></font></div><div><font size="2"><span style="color:rgb(0,0,0)"><b><span style="background-color:rgb(255,255,255)">India- 769008<br></span></b></span></font></div><div dir="ltr"><font size="2"><span style="color:rgb(0,0,0)"><b><span style="background-color:rgb(255,255,255)">Phone: <a href="tel:%2B91-8908671881" value="+918908671881" target="_blank">+91-8908671881</a><br><br><a href="http://www.researchgate.net/profile/Kishore_Ragi" target="_blank">http://www.researchgate.net/profile/Kishore_Ragi</a><br><br><a href="https://in.linkedin.com/in/kishoreragi" target="_blank">https://in.linkedin.com/in/kishoreragi</a><br><br><a href="http://kishoreragi.webnode.com/" target="_blank">http://kishoreragi.webnode.com/</a></span></b></span></font><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div></div><div><div>
<br><div class="gmail_quote">On Sat, Dec 26, 2015 at 10:18 PM, Muhammad Latif <span dir="ltr"><<a href="mailto:latif.met@gmail.com" target="_blank">latif.met@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Hi Jeff, Let's suppose, I have two boxes on map 1 (Model) and similar on map
2 (Observation) of rainfall climatologies. I want to compute spatial
correlation (scorr) between two maps, considering only the data within
the defined boxes.<br><br></div>Thanks</div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Dec 26, 2015 at 9:40 PM, Muhammad Latif <span dir="ltr"><<a href="mailto:latif.met@gmail.com" target="_blank">latif.met@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Thanks Jeff Duda, Would you please elaborate a bit more?<br><br></div>Regards<br></div><div><div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Dec 26, 2015 at 9:26 PM, Jeff Duda <span dir="ltr"><<a href="mailto:jeffduda319@gmail.com" target="_blank">jeffduda319@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>Create your fields such that they have empty boxes within them. Use maskout.<br><br></div>Jeff Duda<br></div><div class="gmail_extra"><br><div class="gmail_quote"><div><div>On Sat, Dec 26, 2015 at 9:28 AM, Muhammad Latif <span dir="ltr"><<a href="mailto:latif.met@gmail.com" target="_blank">latif.met@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div dir="ltr"><div>Hi all Grads users,<br><br></div><div>As, "scorr" function calculates the spatial correlation between two variables
over an X-Y domain, i.e. <code>scorr(<i>expr1, expr2</i>, lon=0, lon=360, lat=-90, lat=90)</code>. Is there any way to use this scorr function when the domains are more than one (let's say, I have two boxes on a single map)?<br><br>Thank you <br></div><div> </div><div>Regards<span><font color="#888888"><br><br></font></span></div><span><font color="#888888"><div>Latif<br></div><br></font></span></div>
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<br></blockquote></div><span><font color="#888888"><br><br clear="all"><br>-- <br><div>Jeff Duda<br>Graduate research assistant<br>University of Oklahoma School of Meteorology<br>Center for Analysis and Prediction of Storms<br></div>
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