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

[Deniz Bozkurt]

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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