Re: gsn_contour problem with data falling in same range

Hi Vaibhav,
Try setting cnRasterSmoothingOn to True if you want the contouring to look more like an AreaFill type plot.
 -dave

On Apr 28, 2014, at 12:02 AM, Vaibhav Saxena <saxena.vaibhav@gmail.com> wrote:

> Hi Adam,
>
> Sorry for the long silence. The settings mentioned in your last email worked. The boundaries between the two contours were not very sharp after setting these parameters but at least I don't get white image and contours are plotted.
>
> Thanks,
> - Vaibhav
>
> On Mon, Feb 17, 2014 at 11:00 PM, Adam Phillips <asphilli@ucar.edu> wrote:
> Hi Vaibhav,
> See this previous ncl-talk posting:
> http://www.ncl.ucar.edu/Support/talk_archives/2009/0460.html
> in short, try setting cnFillMode = "RasterFill"
>
> If that fix does not work please respond to ncl-talk..
> Adam
>
> On Feb 16, 2014, at 23:31, Vaibhav Saxena <saxena.vaibhav@gmail.com> wrote:
>
>> Hi All,
>>
>> I am trying to plot the contours for the parameter T2 (Temp at 2m) in WRF output file using the gsn_contour function. I wanted to set the countours levels explicitly so I used the "cnLevelSelectionMode" resource and set it to "ExplicitLevels". Then I specified my contour levels as "opts@cnLevels = (/10,20,25,26,27,27.5,28,29,30,35/)". The problem which I am facing is that when all the data values fall in one range (say 10 - 20 or 28 - 29), I get a white image and my contours are not plotted. I checked the data values and found that they are not constant but they fall in the same range. I neither get any error nor any warning. What do I do to avoid this and get a contour (which will be obviously of one color depending upon the range the data values fall into)?
>>
>> Thanks,
>> - Vaibhav
>>
>> --
>> email: saxena.vaibhav@gmail.com
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>
>
>
> --
> email: saxena.vaibhav@gmail.com
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Received on Mon Apr 28 10:40:00 2014