<div dir="ltr"><div class="gmail_default" style="font-size:small">Hi Meina,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">One thing that might cause gsn_csm_streamline_scalar_map to seg fault is if you are trying to plot really large data arrays.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">It's always important to look at your data when NCL isn't plotting it correctly, and we recommend using "printVarSummary" for this.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">How big are U and V? Please insert a "printVarSummary" command and let us know what it reports:</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">printVarSummary(U)</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Also, it would help to see how you are calling gsn_csm_streamline_scalar_map, and what resources you're setting.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">I verified that a small test code works just fine, which I've attached here, along with the data file.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">--Mary</div><div class="gmail_default" style="font-size:small"><br></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jul 5, 2017 at 6:14 PM, Meina Wang <span dir="ltr"><<a href="mailto:mnawang@ucdavis.edu" target="_blank">mnawang@ucdavis.edu</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 class="gmail_default" style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)"><div class="gmail_default" style="font-size:13px">Dear All,</div><div class="gmail_default" style="font-size:13px"><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:13px;color:rgb(34,34,34)"><font face="arial, helvetica, sans-serif" style="color:rgb(0,0,0)">I wanted to use the function "<span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.1"><span id="m_-2976305417731282082:2ay.1">gsn</span></span>_<span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.2"><span id="m_-2976305417731282082:2ay.2">csm</span></span>_streamline_scalar_map<wbr>" to plot wind streamline using U and V, with color-coded <span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.3"><span id="m_-2976305417731282082:2ay.3">scaler</span></span> field <span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.4"><span id="m_-2976305417731282082:2ay.4">sqrt</span></span>(<wbr>U^2+V^2), but got "segmentation fault". I then switched to function "</font><span style="font-family:Menlo;font-size:12px"><span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.5"><span id="m_-2976305417731282082:2ay.5">gsn</span></span>_<span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.6"><span id="m_-2976305417731282082:2ay.6">csm</span></span>_vector_scalar_map_<span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.7"><span id="m_-2976305417731282082:2ay.7">ce</span></span>"<wbr> </span><font face="arial, helvetica, sans-serif"><span style="font-size:12px">to do wind barb plot instead using the same data and it worked well. I have previously used the streamline function and had no problem at all, so I'm wondering if any of you recently ran into the same "</span></font>segmentation fault" issue as I did. Is it the internal code of the function crashed? Thank you.</div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:13px;color:rgb(34,34,34)"><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:13px;color:rgb(34,34,34)">P.S. <font face="arial, helvetica, sans-serif" style="font-family:arial,helvetica,sans-serif;color:rgb(0,0,0)">I'm using the <span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.8"><span id="m_-2976305417731282082:2ay.8">NCL</span></span> version </font><span style="font-family:Menlo;color:rgb(0,0,0);font-size:12px">6.4.0. </span><font face="arial, helvetica, sans-serif"><span style="color:rgb(0,0,0);font-size:12px">and ran on Linux machine with </span><span style="font-size:12px;color:rgb(0,0,0)"><span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.9"><span id="m_-2976305417731282082:2ay.9">gcc</span></span> (<span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.10"><span id="m_-2976305417731282082:2ay.10">Ubuntu</span></span> 4.8.4-<wbr>2ubuntu1~14.04.3) 4.8.4</span></font></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:13px;color:rgb(34,34,34)"><br></div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:13px;color:rgb(34,34,34)">Best,</div><div class="gmail_default" style="font-family:arial,sans-serif;font-size:13px;color:rgb(34,34,34)"><span id="m_-2976305417731282082gmail-m_-5901914290479514070:29e.11"><span id="m_-2976305417731282082:2ay.11">Meina</span></span></div></div><span class="HOEnZb"><font color="#888888"><div><br></div>-- <br><div class="m_-2976305417731282082gmail_signature"><div dir="ltr"><div><div dir="ltr"><font size="2" color="#000000" style="background-color:rgb(255,255,255)" face="arial, helvetica, sans-serif"><span id="m_-2976305417731282082:2ay.12">Meina</span> Wang</font><div><font size="2" color="#000000" style="background-color:rgb(255,255,255)" face="arial, helvetica, sans-serif">PhD candidate in Atmospheric Science</font></div><div><font size="2" color="#000000" style="background-color:rgb(255,255,255)" face="arial, helvetica, sans-serif">Department of Land, Air and Water Resources</font></div><div><font size="2" color="#000000" style="background-color:rgb(255,255,255)" face="arial, helvetica, sans-serif">University of California, Davis</font></div><div><font size="2" color="#000000" style="background-color:rgb(255,255,255)" face="arial, helvetica, sans-serif">Davis, CA 95616</font></div></div></div></div></div>
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