Re: how to plot this contour map

Look at the Application/Examples page

In particular,
http://www.ncl.ucar.edu/Applications/HiResPrc.shtml

There are several ways to handle this. Two approaches:

[1] Set the zero or very small values to the background
     color or a color 'near' the back ground color.
     EG: cmorph_3.ncl

[2] Use a trick. Say "x" is the variable to be plotted

      x@_FillValue = 0.0
      x@_FillValue = 1e20

You must use both lines in the above order.

On 10/11/10 4:10 PM, H.Dang wrote:
> Hi dear all,
>
> I have some data to plot, but got no idea which function I should use.
> The data is like V(100,100), but the value on most grids are zero, I
> want to plot contours on those non-zero area, say, V(30:40, 30:40). So
> What command should I use? Thank you!
>
> --
> Cordially,
> Hongyan
> 鸿雁
>
>
>
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Received on Mon Oct 11 20:16:59 2010