<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><meta http-equiv=Content-Type content="text/html; charset=utf-8"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><div><div><p class=MsoNormal>Hi Grad Users,<o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><div><p class=MsoNormal>I have NetCDF file having Ocean Current Data (attached for reference). Am using below command to display u_velocity and v_velocity and generating vector plot using SKIP() function from Grads.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><div><p class=MsoNormal><b>reinit</b><o:p></o:p></p></div><div><p class=MsoNormal><b>sdfopen D:/<a href="http://rtofs_glo_2ds_f024_daily_prog.nc">rtofs_glo_2ds_f024_daily_prog.nc</a></b><o:p></o:p></p></div><div><p class=MsoNormal><b>set vpage 0 11 0 8.5</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set parea 0 11 0 8.5</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set lon 74 434</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set lat -70 70</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set mproj latlon</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set display color white</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set datawarn off</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set grads off</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set timelab off</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set xlab off</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set ylab off</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set frame off</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set t 1</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set cint 40</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set display color white</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set background 0 </b><o:p></o:p></p></div><div><p class=MsoNormal><b>set gxout vector</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set cthick 6</b><o:p></o:p></p></div><div><p class=MsoNormal><b>set ccolor 1</b><o:p></o:p></p></div><div><p class=MsoNormal><b><span style='color:red'>d skip(u_velocity*1.95,8,8);skip(v_velocity*1.95,8,8)</span></b><o:p></o:p></p></div><div><p class=MsoNormal><b>printim D:\output.png x1061 y587 -t 0</b><o:p></o:p></p></div></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>output is attached and unfortunately this is not what i need exactly. It is just plotting every 8th point. I want to plot <b>areal average</b> of every 8 points and want exactly the same plot.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><img border=0 width=562 height=310 id="_x0000_i1025" src="cid:image001.png@01CF6572.22ABDF40"><br><o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>NetCDF file has 4320 LON points and 2160 LAT points. The “display” command is powerful enough to iterate along the longitude and latitude. But <span style='color:#1F497D'><a href="http://www.iges.org/grads/gadoc/gradfuncaave.html">aave()</a></span> function needs fixed X and Y dimensions, no STRIDE option for X and Y. <o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal>How can I achieve this using Grads??? Ultimately I need global vector output.<o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p></div><div><p class=MsoNormal>Please help me on this. Thanks in advance.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>-Anil Kumar<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div></div></div></body></html>