<div dir="ltr"><div>The documentation for <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/simpne.shtml"><b>simpne </b></a>states it uses 3 points<br></div><div><b>simpne</b> - Integrates a sequence of unequally or equally spaced points using Simpson's t<b>hree-point formula</b>. <br></div><div><br></div><div>Hence: 2 points will not work.</div><div>====================================<br></div><div><br></div><div>Possibly: the <a href="http://www.ncl.ucar.edu/Document/Functions/Built-in/ftcurvi.shtml"><b>ftcurvi</b></a> could be used</div><div><br></div><div>======================================</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Jul 21, 2021 at 9:36 AM Chathurika via ncl-talk <<a href="mailto:ncl-talk@mailman.ucar.edu">ncl-talk@mailman.ucar.edu</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><p style="font-family:Arial">
<span style="font-family:Georgia;font-size:16px">Dear all,</span>
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<span style="font-family:Georgia;font-size:16px"><br>
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<span style="font-family:Georgia"><span style="font-size:16px">I want to integrate latitude (y) over the temperature (T(x,y)). I tried to use the function "simpne" but It gives me an error which is "Must have three or more non-missing values". </span></span>
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<span style="font-family:Georgia"><span style="font-size:16px"><br>
</span></span>
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<span style="font-family:Georgia"><span style="font-size:16px">Could you please suggest me an another way to do the integration?</span></span>
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<span style="font-family:Georgia"><span style="font-size:16px"><br>
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<span style="font-family:Georgia"><span style="font-size:16px">Millions of thanks and best regards,</span></span>
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<span style="font-family:Georgia"><span style="font-size:16px">Chathu</span></span>
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<span style="font-style:italic"><span style="font-size:x-small">Wickramage Chathurika Hemamali</span></span>
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<span style="font-style:italic"><span style="font-size:x-small">Msc in Physical Oceanography</span></span>
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<div id="gmail-m_-6623219800808777383ydpc6aa4ef1yui_3_16_0_ym19_1_1496286059659_2251">
<span style="font-style:italic"><span style="font-size:x-small">State Key Laboratory of Tropical Oceanography</span></span>
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<div id="gmail-m_-6623219800808777383ydpc6aa4ef1yui_3_16_0_ym19_1_1496286059659_2252">
<span style="font-style:italic"><span style="font-size:x-small">South China Sea Institute of Oceanology</span></span>
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<div id="gmail-m_-6623219800808777383ydpc6aa4ef1yui_3_16_0_ym19_1_1496286059659_2252">
<span style="font-style:italic"><span style="font-size:x-small">University of Chinese Academy of Science</span></span>
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<div id="gmail-m_-6623219800808777383ydpc6aa4ef1yui_3_16_0_ym19_1_1496286059659_2264">
<span style="font-style:italic"><span style="font-size:x-small">China</span></span>
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