[ncl-talk] Adding a reference line for third Y axis

[Mary Haley]

Deniz,

I was unable to reproduce the problem.  Can you try running this script,
which does what I think you were describing?  I think you should be able to
run it as-is, and it should produce the attached PNG image.

--Mary


On Tue, Jun 23, 2015 at 2:26 PM, Deniz Bozkurt <bozkurtd at itu.edu.tr> wrote:

>  Hi all,
>
> I am using “gsn_csm_xy3” function to have an XY plot with three different
> Y axes (figure is attached). A horizontal reference line is added by
> “gsnYRefLine” resource for the right Y axis with these lines:
>
> resL at gsnYRefLine   = 0
> resL at gsnYRefLineColor = "forestgreen"
> resL at gsnYRefLineThicknessF = 1.0
> resL at gsnYRefLineDashPattern = 0
>
> When I simply try to add another reference line for the rightmost Y axis
> with following lines, I am receiving “warning:TransformPostDraw:
> tfPolyDrawList element 0 is invalid”:
>
> resM at gsnYRefLine   = 0
> resM at gsnYRefLineColor = "red"
> resM at gsnYRefLineThicknessF = 1.0
> resM at gsnYRefLineDashPattern = 0
>
> What I have understood from NCL mailing archive, this warning message is
> related with multiple calling of “gsn_add_xxxx” functions. However, I don’t
> have any idea why NCL does not draw the reference line for the rightmost Y
> axis for this case. I could probably draw it by using “gsn_polyline” but I
> would be pleased if anyone suggests a way to do it with “gsnYRefLine”.
>
> NCL: 6.2.0
>
> Thanks in advance,
>
> Deniz
>
> --
> Deniz Bozkurt, PhD
> Post-doctoral Fellow
> Center for Climate and Resilience Research
> Department of Geophysics, University of Chile
> Blanco Encalada 2002, Santiago, Chile
> E-mail: dbozkurt at dgf.uchile.cl, deniboz at gmail.com
> Web: http://dgf.uchile.cl/~dbozkurt/
>
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