Re: opacity in scatter plot?

From: Brammer, Alan P <abrammer_at_nyahnyahspammersnyahnyah>
Date: Thu Apr 17 2014 - 11:47:15 MDT

Ah, I understand what you’re trying now. I can’t comment on the lack of this functionality, but here’s how I would work around it.

use gsn_csm_blank_plot to create the background plot, with all the resources you’re already setting.
Then add the data points using gsn_add_polymarker with the marker resources you set on lines 266/267. Though xyMarkerColor should then be gsMarkerColor.

Alan.

On Apr 17, 2014, at 12:37 PM, Ufuk Utku turuncoglu <uturunco@ictp.it<mailto:uturunco@ictp.it>> wrote:

Yes. As you said, the application example in the NCL side was using gsn_add_polymarker not xy plot. So, i just want to try it but apparently is it not working in this case. Of course, i could work around it by using gsn_add_polymarker for each marker in the scatter plot but it might be good to have this feature in gsn_csm_xy also. Anyway, there could be another way that i don't know. Let's wait and see! Thanks.

--ufuk

On 17/04/14 19:29, Kyle Griffin wrote:
Interesting find, Ufuk. Your error comes from the fact that gsMarkerOpacityF is, in general, used exclusively for the addition of markers via gsn_add_polymarker. What you've done, instead, is try to use it in an xy plot, where there are an entirely separate set of xyMarker resources. This is interesting because, as of yet, there is not documentation for an xyMarkerOpacity resource.

Although I haven't looked at the code myself or tried to validate my thoughts here, I would guess this is an NCL bug - or perhaps more appropriately, a lack of feature so far.

----------------------------------------
Kyle S. Griffin
Department of Atmospheric and Oceanic Sciences
University of Wisconsin - Madison
Room 1421
1225 W Dayton St, Madison, WI 53706
Email: ksgriffin2@wisc.edu<mailto:ksgriffin2@wisc.edu>

On Thu, Apr 17, 2014 at 11:22 AM, Ufuk Utku turuncoglu <uturunco@ictp.it<mailto:uturunco@ictp.it>> wrote:
Thanks for your help. Actually, i am getting following message when i try to use it,

warning:gsMarkerOpacityF is not a valid resource in ...

you can find the script as attachment (look at around line 264).

--ufuk

On 17/04/14 17:24, Brammer, Alan P wrote:
What version of NCL are you using? ncl -V to find out. If it’s older than 6.1.0 then the functionality won’t work.

I just tested it in the script I had open and it worked as expected with a gsn_csm_xy plot using 6.2.0.

If you have 6.1 or later, send your script to the list and further details can be explored.

Alan.

##############################
Alan Brammer,
PhD Student,

Department of Atmospheric and Environmental Sciences,
University at Albany, State University of New York, Albany, NY, 12222
abrammer@albany.edu<mailto:abrammer@albany.edu>
##############################

On Apr 17, 2014, at 8:56 AM, Ufuk Utku turuncoglu <uturunco@ictp.it<mailto:uturunco@ictp.it>> wrote:

Hi,

I just wonder that is it possible to change the opacity of the markers
in scatter plots which is created by using gsn_csm_xy function. I tried
to use gsMarkerOpacityF resource but it is not working with gsn_csm_xy.

Regards,

--ufuk
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Received on Thu Apr 17 11:47:42 2014

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