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<p class="MsoNormal"><span style="font-size:11.0pt">Dear NCL support staff and users,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I found a bug in the ncl function taper (and taper_n) such that when the option 1 is chosen the function does not copy all the values of the input array to the output array, except for the portions that are
tapered. In my environment (NERSC and PNNL computing facilities), the uncopied values in the output array are all zero. This bug had a serious impact on my work.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">The function works correctly when option 0 is chosen. This difference arises because the output array is not initialized properly in the underlying fortran code (taper.f) when option 1 is selected.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I provided more details in the NCL github issues<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><a href="https://github.com/NCAR/ncl/issues/171">https://github.com/NCAR/ncl/issues/171</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">I posted a bug report about a month ago following
<a href="https://www.ncl.ucar.edu/Support/posting_guidelines.shtml">https://www.ncl.ucar.edu/Support/posting_guidelines.shtml</a>, but no responses have been provided, so I am reporting here in the ncl-talk. I see a few even older postings without responses
from the developers there... I am aware that NCL is in the maintenance mode without further development, but I think more close and regular attention should be paid to the issues posted on NCL github because NCL is still very widely used.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Best regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Koichi<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">--------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Koichi Sakaguchi, Ph.D.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Earth Scientist<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">ATMOSPHERIC SCIENCES & GLOBAL CHANGE <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Pacific Northwest National Laboratory<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">3200 Innovation Blvd<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">PO Box 999, MSIN: K9-24<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Richland, WA 99352 USA<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Phone: 509-375-7385<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Fax: 509-375-6448<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">Email:koichi.sakaguchi@pnnl.gov</span><o:p></o:p></p>
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