Re: Opacity in contour plot

From: <brownrig_at_nyahnyahspammersnyahnyah>
Date: Fri Oct 19 2012 - 10:47:22 MDT

On Fri, 19 Oct 2012 11:17:08 +0200
Hi Nadeem,

I will look into this first thing next week and get back with you...


  imran nadeem <> wrote:
> 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
>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 <> 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:
>> 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
>>> fatal:ContourPlotDraw: draw error
>>> warning:WorkstationDeactivate: workstation not active or not opened
>>> I can avoid this message by setting cnFillMode to RasterFill but
>>> I cannot use transparency through cnFillOpacityF.
>>> Any suggestion to solve this problem
>>> Thanks in advance.
>>> Regards
>>> Nadeem
>>> _______________________________________________
>>> ncl-talk mailing list
>>> List instructions, subscriber options, unsubscribe:
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:

ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
Received on Fri Oct 19 10:47:33 2012

This archive was generated by hypermail 2.1.8 : Tue Oct 23 2012 - 11:10:04 MDT