2010/7/24 Joćo Teixeira <span dir="ltr"><<a href="mailto:a38978@ua.pt">a38978@ua.pt</a>></span><br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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Hi there,<br>
I made a script to calculate the geostrophic wind in a certain level,
and fixed point off my grid (in attachment). <br>
Now I would like to make a fancy display off it, like wind barb's, but
all I can display is a line graph...<br>
I already try to use set gxout barb and <i>set gxou<code></code><code></code></i><code><i><big>t
tserbarb</big></i>, <big>with out any success.<br>
Does anybody know how to get the graphic to work.<br>
The data is varying in time for a simgle point (1-D)<br>
</big></code></div></blockquote><div><br></div><div>The problem is that "gxyt tserbarb" is only implemented for station data, it apparently does not work for gridded data. However, the gr2stn() function could be used to fake station data. For example,</div>
<div><br></div><div>open model</div><div>set level 200</div><div>set t 1 5</div><div>set gxout tsrbarb</div><div>d gr2stn(ua,-90,45);gr2stn(va,-90,45)</div><div> </div><div>The gr2stn() function interpolates gridded data to the lon/lat point (90W,45N in this example). Therefore, you may need to compute the geostrophic wind on the whole grid before using this function, even if you only need ug, vg on a single point.</div>
<div><br></div><div>If you are using the opengrads bundle distro, I'd write the a gsudf (an expression function as a gs script) for ug, vg and use it in the expression</div><div><br></div><div>d gr2stn(ug(h),-90,45);gr2stn(vg(h),-90,45)</div>
<div><br></div><div>You can can find out more about gsudf's here:</div><div><br></div><div> <a href="http://opengrads.org/doc/udxt/gsudf/">http://opengrads.org/doc/udxt/gsudf/</a></div><div><br></div><div>It would have been far more convenient if 'gxout tserbarb' worked for gridded data.</div>
<div><br></div><div> Good Luck,</div><div><br></div><div> Arlindo</div><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div text="#000000" bgcolor="#ffffff">
<code><big>Thanks<br>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Arlindo da Silva<br><a href="mailto:dasilva@alum.mit.edu">dasilva@alum.mit.edu</a><br>