<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Further clarification: <div>The asum() function does not weight the area of a grid box by latitude. It only weights the partial grid boxes at the edges of the boundary if the domain does not line up exactly with the grid box edge. There is a new function coming in version 2.0.2 called atot() that does the same as asum, except it also weights the grid box areas by the difference in the sine of the latitude at the north and south edges. The documentation pages for these functions have been updated. --Jennifer</div><div><br><br><div><div>On Oct 30, 2012, at 3:11 PM, Mike NOAA imap wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
<meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type">
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hi Sagar,<br>
<br>
the reason why asum and asumg give the same answer is that world
coordinates (e.g., lat/lon) bounds were on the grid boundary. I
wrote asumg to ignore if a the world coordinate bound was in the
middle of a grid box. If it was, then asum would only add half the
value of that grid box to the sum whereas asumg would add the whole
value.<br>
<br>
best /r Mike <br>
<br>
<div class="moz-cite-prefix">On 2012-10-16 19:35 , Sagar Parajuli
wrote:<br>
</div>
<blockquote cite="mid:00c001cdabd5$71634f90$5429eeb0$@utexas.edu" type="cite">
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<div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank
you, I just used asumg and it seems that both give the same
result.<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sincerely,<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Sagar
Prasad Parajuli<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Graduate
Student/Research Assistant<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">University
of Texas at Austin<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Jackson
School of Geosciences<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">1
University Station C1100, JGB 5.322<br>
Austin, TX 78712<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Contact:
<a moz-do-not-send="true" href="mailto:psagar@utexas.edu"><span style="color:#E36C0A">psagar@utexas.edu</span></a><o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Cell:
512 965 4093<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><span><Mail Attachment.jpeg></span><o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a class="moz-txt-link-abbreviated" href="mailto:gradsusr-bounces@gradsusr.org">gradsusr-bounces@gradsusr.org</a>
[<a class="moz-txt-link-freetext" href="mailto:gradsusr-bounces@gradsusr.org">mailto:gradsusr-bounces@gradsusr.org</a>] <b>On Behalf Of </b>Jeff
Duda<br>
<b>Sent:</b> Tuesday, October 16, 2012 2:27 PM<br>
<b>To:</b> GrADS Users Forum<br>
<b>Subject:</b> Re: [gradsusr] summing<o:p></o:p></span></p><p class="MsoNormal"><o:p> </o:p></p><p class="MsoNormal" style="margin-bottom:12.0pt">Sagar,<br>
Note that asum uses weighting by latitude to account for
projected grids. If you want to ignore that, use asumg.<br>
<br>
Jeff<o:p></o:p></p>
<div><p class="MsoNormal">On Tue, Oct 16, 2012 at 2:25 PM, Sagar
Parajuli <<a moz-do-not-send="true" href="mailto:psagar@utexas.edu" target="_blank">psagar@utexas.edu</a>>
wrote:<o:p></o:p></p>
<div>
<div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Thank
you, I didn’t realize the asum function.</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Sincerely,</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Sagar
Prasad Parajuli</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Graduate
Student/Research Assistant</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">University
of Texas at Austin</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Jackson
School of Geosciences</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">1
University Station C1100, JGB 5.322<br>
Austin, TX 78712</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Contact:
<a moz-do-not-send="true" href="mailto:psagar@utexas.edu" target="_blank"><span style="color:#E36C0A">psagar@utexas.edu</span></a></span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#E36C0A">Cell:
512 965 4093</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a moz-do-not-send="true" href="mailto:gradsusr-bounces@gradsusr.org" target="_blank">gradsusr-bounces@gradsusr.org</a>
[mailto:<a moz-do-not-send="true" href="mailto:gradsusr-bounces@gradsusr.org" target="_blank">gradsusr-bounces@gradsusr.org</a>] <b>On
Behalf Of </b>Jeff Duda<br>
<b>Sent:</b> Tuesday, October 16, 2012 2:16 PM<br>
<b>To:</b> GrADS Users Forum<br>
<b>Subject:</b> Re: [gradsusr] summing</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt">Sagar,<br>
Either nest the sum functions or use the asum function
for areal sums.<br>
<br>
Jeff Duda<o:p></o:p></p>
<div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">On
Tue, Oct 16, 2012 at 2:11 PM, Sagar Parajuli <<a moz-do-not-send="true" href="mailto:psagar@utexas.edu" target="_blank">psagar@utexas.edu</a>>
wrote:<o:p></o:p></p>
<div>
<div><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Hi,
can anyone suggest how to sum the values in a
grid. I have to first in t-direction and then in x
and y direction.<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">define
a=sum(dstflxt*area, t=1, t=365) (summing in
t-direction, this works fine)<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">define
b= sum(a,x=1,x=288,y=1,y=192) (summing in x
and y direction, this doesn’t work)<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">d
b<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">It
displays error in sum options.<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Please
help.<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto">Sincerely,<o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#E36C0A">Sagar Prasad Parajuli</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#E36C0A">Graduate Student/Research
Assistant</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#E36C0A">University of Texas at
Austin</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#E36C0A">Jackson School of
Geosciences</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#E36C0A">1 University Station
C1100, JGB 5.322<br>
Austin, TX 78712</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#E36C0A">Contact: <a moz-do-not-send="true" href="mailto:psagar@utexas.edu" target="_blank"><span style="color:#E36C0A">psagar@utexas.edu</span></a></span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="color:#E36C0A">Cell: 512 965 4093</span><o:p></o:p></p><p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"> <o:p></o:p></p>
</div>
</div><p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><br>
_______________________________________________<br>
gradsusr mailing list<br>
<a moz-do-not-send="true" href="mailto:gradsusr@gradsusr.org" target="_blank">gradsusr@gradsusr.org</a><br>
<a moz-do-not-send="true" href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><o:p></o:p></p>
</div><p class="MsoNormal" style="mso-margin-top-alt:auto;margin-bottom:12.0pt"><span style="color:#888888"><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<o:p></o:p></span></p>
</div>
</div><p class="MsoNormal" style="margin-bottom:12.0pt"><br>
_______________________________________________<br>
gradsusr mailing list<br>
<a moz-do-not-send="true" href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>
<a moz-do-not-send="true" href="http://gradsusr.org/mailman/listinfo/gradsusr" target="_blank">http://gradsusr.org/mailman/listinfo/gradsusr</a><o:p></o:p></p>
</div><p class="MsoNormal" style="margin-bottom:12.0pt"><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<o:p></o:p></p>
</div>
<br>
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<br>
<pre wrap="">_______________________________________________
gradsusr mailing list
<a class="moz-txt-link-abbreviated" href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a>
<a class="moz-txt-link-freetext" href="http://gradsusr.org/mailman/listinfo/gradsusr">http://gradsusr.org/mailman/listinfo/gradsusr</a>
</pre>
</blockquote>
<br>
</div>
_______________________________________________<br>gradsusr mailing list<br><a href="mailto:gradsusr@gradsusr.org">gradsusr@gradsusr.org</a><br>http://gradsusr.org/mailman/listinfo/gradsusr<br></blockquote></div><br><div apple-content-edited="true">
<span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><span class="Apple-style-span" style="border-collapse: separate; border-spacing: 0px 0px; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-align: auto; -khtml-text-decorations-in-effect: none; text-indent: 0px; -apple-text-size-adjust: auto; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px; "><div>--</div><div>Jennifer M. Adams</div><div>IGES/COLA</div><div>4041 Powder Mill Road, Suite 302</div><div>Calverton, MD 20705</div><div><a href="mailto:jma@cola.iges.org">jma@cola.iges.org</a></div><div><br class="khtml-block-placeholder"></div><br class="Apple-interchange-newline"></span></span></span>
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