Set the graphics output to vector ('set gxout vector'), then 'd zon;mer' (note the semicolon instead of a comma).<br><br>Jeff Duda<br><br><div class="gmail_quote">2011/9/15 Hyacinth Nnamchi <span dir="ltr"><<a href="mailto:hyacinth.1@hotmail.com">hyacinth.1@hotmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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<font style="font-size:10pt" size="2" face="Tahoma">Hello,</font><font style="font-size:10pt" size="2" face="Tahoma"><br></font><font style="font-size:10pt" size="2" face="Tahoma"><br>This is not directly about GrADS but since most of address similar problems, I guess someone on this forum will be able to answer my question.</font><font style="font-size:10pt" size="2" face="Tahoma"><br>
</font><font style="font-size:10pt" size="2" face="Tahoma"><br>I understand that to calculate moisture transport, given zonal, meridional winds and specific humidity, can simply do:</font><font style="font-size:10pt" size="2" face="Tahoma"><br>
</font><div><pre><font style="font-size:10pt" size="2" face="Tahoma">'define zon=uwnd.1*shum.3'</font><font style="font-size:10pt" size="2" face="Tahoma"><br></font><font style="font-size:10pt" size="2" face="Tahoma">'define mer=vwnd.2*shum.3'</font><font style="font-size:10pt" size="2" face="Tahoma"><br>
</font><font style="font-size:! 10pt" size="2" face="Tahoma">'d zon,mer'</font><font style="font-size:10pt" size="2" face="Tahoma"><br></font><font style="font-size:10pt" size="2" face="Tahoma"><br></font><font style="font-size:10pt" size="2" face="Tahoma">But, I want to plot vectors indicating field of net moisture flux (all arrows converging/diverging) instead of just transport.</font><font style="font-size:10pt" size="2" face="Tahoma"><br>
</font><font style="font-size:10pt" size="2" face="Tahoma"><br></font><font style="font-size:10pt" size="2" face="Tahoma">Thanks for any ideas.</font><font style="font-size:10pt" size="2" face="Tahoma"><br></font><font color="#888888"><font style="font-size:10pt" size="2" face="Tahoma"><br>
</font><font style="font-size:10pt" size="2" face="Tahoma">Hyacinth</font><br></font></pre></div> </div></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Jeff Duda<br>Iowa State University<br>Meteorology Graduate Student<br><a href="http://www.meteor.iastate.edu/%7Ejdduda" target="_blank">www.meteor.iastate.edu/~jdduda</a><br>