Try turning off the curly vectors. It&#39;s possible that it hasn&#39;t been enabled for that glyph style.<div> -Dave</div><div><br><br>On Friday, November 7, 2014, Xi Chang &lt;<a href="mailto:xi.chang01@gmail.com">xi.chang01@gmail.com</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Thanks Dave,<br><br>Anyway, nothing happens when I did as follows (the results are still the same):<br><br>  res@gsnScalarContour      = True              ; vectors over scalars<br>  res@vcRefMagnitudeF       = 20.0              ; vec magnitude<br>  res@vcRefLengthF          = 0.06              ; size of ref vector<br>  res@vcLineArrowColor      = &quot;black&quot;           ; white vectors<br>  res@vcMinDistanceF        = 0.025              ; thins arrows near pole  <br>  res@vcGlyphStyle          = &quot;CurlyVector&quot;     ; turns on curley vectors<br>  <b>res@vcMinMagnitudeF       = 5</b><br></div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Nov 7, 2014 at 12:25 AM, David Brown <span dir="ltr">&lt;<a href="javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;dbrown@ucar.edu&#39;);" target="_blank">dbrown@ucar.edu</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><a href="http://www.ncl.ucar.edu/Document/Graphics/Resources/vc.shtml#vcMinMagnitudeF" target="_blank">http://www.ncl.ucar.edu/Document/Graphics/Resources/vc.shtml#vcMinMagnitudeF</a><br>
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On Thu, Nov 6, 2014 at 4:23 PM, Xi Chang &lt;<a href="javascript:_e(%7B%7D,&#39;cvml&#39;,&#39;xi.chang01@gmail.com&#39;);" target="_blank">xi.chang01@gmail.com</a>&gt; wrote:<br>
&gt; Hallo, is there any trick to display wind vectors only for those whose<br>
&gt; magnitude greater than XXX m/s, bellow this values are not plotted. Im using<br>
&gt; a function called gsn_csm_vector.<br>
&gt;<br>
&gt; Thanks<br>
&gt;<br>
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