Reducing the number of wind vectors !!

[Jennifer Adams]

If you don't like the skip option, you can try 'gxout stream'  --
this is a nice way to illustrate a wind field with crowded vectors.
'set strmden' controls the density of the streamlines.
Jennifer

On Mar 20, 2007, at 12:38 AM, John Guhin wrote:

> Hi,
>      I am trying to plot wind vectors at a certain level. Because
> of the high resolution of the data, there are too many vectors, and
> the figure becomes blurred/shaded. Using GrADS 'skip' function  I
> could produce a  readable  figure.  I think 'skip' function only
> skips gridpoints, and does not  take into consideration the values
> at the skipped points.  Is this correct?  If  yes,  how can I
> produce  a  legible  figure of wind vector, which  considers all
> gridpoints while drawing the vector !!
> thanks.....
>
> 'open u.ctl'
> 'open v.ctl'
> 'set lon 140 200';'set lat -10 10';'set lev 200'
> 'set gxout vector';'set ccolor 1';'set cthick 3'
> 'set arrowhead 0.04';'set arrscl '0.5' '20;'set arrlab off'
> 'd skip(ave(u,time=20apr,time=23apr),12,12);skip(ave(v.
> 2,time=20apr,time=23apr))'

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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