<div dir="ltr">Thanks Andrew,<div><br></div><div>Yes i see this function but i don&#39;t know how i can use it because we don&#39;t know the units of wind direction (degree or radian) and if it is meteorological or mathematical direction.</div>
<div><br></div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2014-07-16 18:35 GMT-04:00 Andrew Friedman <span dir="ltr">&lt;<a href="mailto:andfried@berkeley.edu" target="_blank">andfried@berkeley.edu</a>&gt;</span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Rabah,<br>
<br>
You should be able to mask the wind vectors between certain values using the maskout function: <a href="http://www.iges.org/grads/gadoc/gradfuncmaskout.html" target="_blank">http://www.iges.org/grads/gadoc/gradfuncmaskout.html</a><br>

<br>
Andrew<br>
<div><div class="h5"><br>
On Jul 16, 2014, at 3:22 PM, Rabah Hachelaf &lt;<a href="mailto:r.hachelaf@gmail.com">r.hachelaf@gmail.com</a>&gt; wrote:<br>
<br>
&gt; Hi all,<br>
&gt;<br>
&gt; I want to display only wind barbs which have direction between 40 deg and 50 deg (NE direction).<br>
&gt;<br>
&gt; Any suggestions.<br>
&gt;<br>
&gt; Thank you<br>
&gt;<br>
&gt; --<br>
&gt; ------------------------------<br>
&gt; Cordialement,<br>
&gt; Best regards,<br>
&gt; Rabah Hachelaf<br>
&gt;<br>
&gt;<br>
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<br>
<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br><div dir="ltr"><div>------------------------------</div>Cordialement,<br>Best regards,<br>Rabah Hachelaf <br>     ____   <br>    (       )<br>   (        )                       <br>
  (___ __)                      <br>   /////////      <br><br></div>
</div>