Re: Opacity in contour plot

Dear NCL-developers,

         I confirm the problem is coming from very "twisty" contours
drawn in a small area. I tried to enlarge my plots, but still getting
ARSCAM/ARPRAM error.
For me the best solution is that cnFillOpacityF works for RasterFill
or CellFilll because ARSCAM/ARPRAM error doesn't occur for these
contour fill types.
In separate email, I sent data + script to Mary for possible fix.

Regards
Nadeem

On Wed, Oct 17, 2012 at 4:35 PM, Mary Haley <haley@ucar.edu> wrote:
> Hi Nadeem,
>
> We are trying to fix the contouring code so that users don't run into the ARSCAM/ARPRAM error.
> Do you still get an image, by any chance? Sometimes you just get a plot with no data in it.
>
> To help make this error go away, sometimes making the plot slightly larger will help. The error
> shows up sometimes when you have very "twisty" contours that are being drawn in a small area.
> If you make the plot slightly larger, this can help. We see this error more when people are
> panelling plots. Is that what you're doing here?
>
> If so, and if I can see a sample image, then I might be able to suggest ways to make the plots larger.
>
> Even better, if you can provide me with your data and your script, then I can try to reproduce the
> problem here and see if there's an easy fix. You can ftp your script and data . See:
>
> http://www.ncl.ucar.edu/report_bug.shtml#HowToFTP
>
> Hopefully Rick or Dave will address your question about cnFillOpacityF not working with
> RasterFill or CellFill.
>
> --Mary
>
>
>
> On Oct 17, 2012, at 7:32 AM, imran nadeem wrote:
>
>> Dear All,
>> I am using NCL verion 6.1.0-beta to make partially transparent
>> contour plots. For me, the resource "cnFillOpacityF" works only with
>> cnFillMode = "AreaFill". It doesn't have any effect on RasterFill or
>> CellFill.
>> This is problem for me because "AreaFill" is producing the following message.
>>
>> fatal:ContourPlotDraw: ARSCAM/ARPRAM - ALGORITHM FAILURE
>> fatal:ContourPlotDraw: draw error
>> warning:WorkstationDeactivate: workstation not active or not opened
>>
>> I can avoid this message by setting cnFillMode to RasterFill but then
>> I cannot use transparency through cnFillOpacityF.
>>
>> Any suggestion to solve this problem
>> Thanks in advance.
>>
>> Regards
>> Nadeem
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Received on Fri Oct 19 03:17:35 2012