<div class="gmail_quote">On Feb 18, 2008 4:30 PM, Stefan Gofferje <<a href="mailto:gradsusers@gofferje.homelinux.org">gradsusers@gofferje.homelinux.org</a>> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hei,<br><br>is there a possibility to skip or better combine grid fields and show<br>e.g. an average value of a 2x2 area in the center?<br>
</blockquote>
<div> </div>
<div>You can do regridding, with box-averaging. The re() extension or even the classic regrid2 UDF can do this. With re() you simply enter</div>
<div> </div>
<div>ga-> d re(ts,2)</div>
<div> </div>
<div>for interpolating to a 2 deg x 2 deg grid. This dynamic UDF is very fast. More info here:</div>
<div> </div>
<div> <a href="http://opengrads.org/doc/udxt/re/">http://opengrads.org/doc/udxt/re/</a></div>
<div> </div>
<div>or more generally about installing extensions:</div>
<div> </div>
<div> <a href="http://opengrads.org/wiki/index.php?title=User_Defined_Extensions">http://opengrads.org/wiki/index.php?title=User_Defined_Extensions</a></div>
<div> </div>
<div> Arlindo</div></div><br>-- <br>Arlindo da Silva<br><a href="mailto:dasilva@alum.mit.edu">dasilva@alum.mit.edu</a>