Re: Fw:tmp1

From: L <dxlds_at_nyahnyahspammersnyahnyah>
Date: Fri Dec 16 2011 - 22:36:58 MST

Hi David,
Thanks for your help!

Liu

2011-12-17 04:19:52"David Brown" <dbrown@ucar.edu> д
Hi Liu,
This is indeed a problem which we intend to address as soon as possible. In your case, where the field as a whole is not constant, but the sub-area you want to zoom in on is constant, the problem only occurs when cnFillMode is set to "AreaFill" (this is the default). So a work-around fix is to use raster fill. Try adding these lines to your code:

res@cnFillMode = "RasterFill"
res@cnRasterSmoothingOn = True

On Dec 15, 2011, at 7:53 PM, L wrote:

Hi, all
I find that even in the small area, they are not constant, but they are in the same range. If I make the levels preciser, the output is fine.
But I want to draw it without change the level set, and just plot an image with one single color.

With regards,
Liu

-------- Forwarding messages --------
From: L <dxlds@163.com>
Date: 2011-12-16 10:42:27
To: ncl-talk <ncl-talk@ucar.edu>
Subject: tmp1

Hi, dear NCL users,
I get some problem about contour plot.
You can see the tmp1 file attached, this is what the data (say a 20*20 array )actually like.
But when I reduce the map area, without reducing the data size (still 20*20), the output (tmp2) is all white.
It seems like in the small area, values are constant. Maybe this is how the white comes.
Is there any way to solve this?

Best regards

Liu

<tmp1.png><tmp2.png>_______________________________________________
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Received on Fri Dec 16 22:37:16 2011

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