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<DIV>I noticed the two files cover the same region with different 

resolutions.</DIV>

<DIV>So you should open file.1, </DIV>

<DIV>interpolate variables into the same coordinate as file.2</DIV>

<DIV>'define newvar=re2(oldvar...)'</DIV>

<DIV>close file 1</DIV>

<DIV>then open file.2</DIV>

<DIV>compare...</DIV>

<DIV>&nbsp;</DIV>

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<DIV><SPAN>zjuyanlibin</SPAN></DIV>

<DIV>&nbsp;</DIV>

<DIV 

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<DIV 

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<DIV><B>From:</B>&nbsp;<A href="mailto:rjmera@coas.oregonstate.edu">Roberto 

Mera</A></DIV>

<DIV><B>Date:</B>&nbsp;2012-06-21&nbsp;15:13</DIV>

<DIV><B>To:</B>&nbsp;<A href="mailto:gradsusr@gradsusr.org">GrADS Users 

Forum</A></DIV>

<DIV><B>Subject:</B>&nbsp;[gradsusr] regrid problem</DIV></DIV></DIV>

<DIV>

<DIV>Hi.&nbsp;I'm&nbsp;trying&nbsp;to&nbsp;regrid&nbsp;two&nbsp;files&nbsp;to&nbsp;a&nbsp;common&nbsp;grid.&nbsp;The&nbsp;two&nbsp;files&nbsp;have&nbsp;</DIV>

<DIV>different&nbsp;resolutions&nbsp;and&nbsp;projections.&nbsp;Here&nbsp;is&nbsp;the&nbsp;detail&nbsp;for&nbsp;the&nbsp;files:</DIV>

<DIV>&nbsp;</DIV>

<DIV>file&nbsp;1&nbsp;(model)</DIV>

<DIV>&nbsp;&nbsp;&nbsp;Type&nbsp;=&nbsp;Gridded</DIV>

<DIV>&nbsp;&nbsp;&nbsp;Xsize&nbsp;=&nbsp;428&nbsp;&nbsp;Ysize&nbsp;=&nbsp;322&nbsp;&nbsp;Zsize&nbsp;=&nbsp;1&nbsp;&nbsp;Tsize&nbsp;=&nbsp;1198&nbsp;&nbsp;Esize&nbsp;=&nbsp;1</DIV>

<DIV>&nbsp;&nbsp;&nbsp;Number&nbsp;of&nbsp;Variables&nbsp;=&nbsp;1</DIV>

<DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;px1&nbsp;&nbsp;1&nbsp;&nbsp;t,z,y,x&nbsp;&nbsp;px1</DIV>

<DIV>X&nbsp;is&nbsp;varying&nbsp;&nbsp;&nbsp;Lon&nbsp;=&nbsp;-140.885&nbsp;to&nbsp;-94.7226&nbsp;&nbsp;&nbsp;X&nbsp;=&nbsp;1&nbsp;to&nbsp;428</DIV>

<DIV>Y&nbsp;is&nbsp;varying&nbsp;&nbsp;&nbsp;Lat&nbsp;=&nbsp;22.4263&nbsp;to&nbsp;57.129&nbsp;&nbsp;&nbsp;Y&nbsp;=&nbsp;1&nbsp;to&nbsp;322</DIV>

<DIV>Z&nbsp;is&nbsp;fixed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Lev&nbsp;=&nbsp;1&nbsp;&nbsp;Z&nbsp;=&nbsp;1</DIV>

<DIV>T&nbsp;is&nbsp;fixed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Time&nbsp;=&nbsp;00Z01JAN1961&nbsp;&nbsp;T&nbsp;=&nbsp;1</DIV>

<DIV>E&nbsp;is&nbsp;fixed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Ens&nbsp;=&nbsp;1&nbsp;&nbsp;E&nbsp;=&nbsp;1</DIV>

<DIV>&nbsp;</DIV>

<DIV>file&nbsp;2&nbsp;(NARR)</DIV>

<DIV>&nbsp;</DIV>

<DIV>&nbsp;&nbsp;&nbsp;Type&nbsp;=&nbsp;Gridded</DIV>

<DIV>&nbsp;&nbsp;&nbsp;Xsize&nbsp;=&nbsp;107&nbsp;&nbsp;Ysize&nbsp;=&nbsp;80&nbsp;&nbsp;Zsize&nbsp;=&nbsp;1&nbsp;&nbsp;Tsize&nbsp;=&nbsp;384&nbsp;&nbsp;Esize&nbsp;=&nbsp;1</DIV>

<DIV>&nbsp;&nbsp;&nbsp;Number&nbsp;of&nbsp;Variables&nbsp;=&nbsp;1</DIV>

<DIV>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pmax1&nbsp;&nbsp;1&nbsp;&nbsp;t,z,y,x&nbsp;&nbsp;pmax1</DIV>

<DIV>X&nbsp;is&nbsp;varying&nbsp;&nbsp;&nbsp;Lon&nbsp;=&nbsp;-140.885&nbsp;to&nbsp;-94.7226&nbsp;&nbsp;&nbsp;X&nbsp;=&nbsp;-1081.74&nbsp;to&nbsp;-943.241</DIV>

<DIV>Y&nbsp;is&nbsp;varying&nbsp;&nbsp;&nbsp;Lat&nbsp;=&nbsp;22.4263&nbsp;to&nbsp;57.129&nbsp;&nbsp;&nbsp;Y&nbsp;=&nbsp;-15.7149&nbsp;to&nbsp;88.4036</DIV>

<DIV>Z&nbsp;is&nbsp;fixed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Lev&nbsp;=&nbsp;1&nbsp;&nbsp;Z&nbsp;=&nbsp;2</DIV>

<DIV>T&nbsp;is&nbsp;fixed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Time&nbsp;=&nbsp;00Z01JAN1961&nbsp;&nbsp;T&nbsp;=&nbsp;-215</DIV>

<DIV>E&nbsp;is&nbsp;fixed&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Ens&nbsp;=&nbsp;1&nbsp;&nbsp;E&nbsp;=&nbsp;1</DIV>

<DIV>&nbsp;</DIV>

<DIV>&nbsp;</DIV>

<DIV>I&nbsp;would&nbsp;like&nbsp;to&nbsp;regrid&nbsp;to&nbsp;25&nbsp;km&nbsp;or&nbsp;1/3&nbsp;degree&nbsp;so&nbsp;I&nbsp;can&nbsp;calculate&nbsp;</DIV>

<DIV>anomalies&nbsp;between&nbsp;the&nbsp;two.</DIV>

<DIV>&nbsp;</DIV>

<DIV>thanks</DIV>

<DIV>&nbsp;</DIV>

<DIV>Robert</DIV>

<DIV>_______________________________________________</DIV>

<DIV>gradsusr&nbsp;mailing&nbsp;list</DIV>

<DIV>gradsusr@gradsusr.org</DIV>

<DIV>http://gradsusr.org/mailman/listinfo/gradsusr</DIV></DIV></BODY></HTML>