Re: Opacity in contour plot

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 Wed Oct 17 08:35:32 2012