<div>Oops, I didn't pay enough attention on that fundamental detail. Thanks Rick for pointing it out!</div><div><br></div><div><div>Yes, gsn_add_polyline() works, but I was wondering if a simple resource as gsnYRefLine could be set for doing that. Instead it's not possible to use that resource on graphic routines other than gsn_csm_xy(), isn't it? <br></div></div><div><br></div><div>I think the reference to "Windstress_timeseries_contour" is just due to the name of my script (Windtress_timeseries.ncl), nothing important.</div><div><br></div><div>Cheers,</div><div>Giorgio</div><blockquote>
----Messaggio originale----
<br> Da: brownrig@ucar.edu
<br> Data: 30-mag-2019 5.06
<br> A: "Giorgio Graffino"<g.graffino@tim.it>
<br> Cc: "Ncl-talk"<ncl-talk@ucar.edu>
<br> Ogg: Re: [ncl-talk] gsn_csm_hov and gsnYRefLine
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Hi,
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This is a cursory response -- I really don't know the answer in any detail. But...
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- The docs on the resource gsnYRefLine state that it pertains to calls to gsn_csm_xy(), and so perhaps not surprising that errors stem from a call to gsn_csm_hov():
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<a href="http://ncl.ucar.edu/Document/Graphics/Resources/gsn.shtml#gsnYRefLine">http://ncl.ucar.edu/Document/Graphics/Resources/gsn.shtml#gsnYRefLine</a>
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- I am perplexed by the error message's reference to "Windstress_timeseries_contour". A reference to this symbol is not found anywhere in the NCL code base -- is this a function you might have written or otherwise drawn from a 3rd party library?
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- If I understand correctly your intent, your method of drawing multiple lines with gsn_add_polyline() would seem to be the better approach, as the docs for gsnYRefLine suggest only a singular line can be drawn.
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I hope that helps...
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Rick
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On Wed, May 29, 2019 at 7:22 AM Giorgio Graffino <
<a href="javascript:handleMailto('mailto:g.graffino@tim.it');return false;">g.graffino@tim.it</a>> wrote:
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Dear NCL people,
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I am struggling on using the resource gsnYRefLine in Hovmoeller plots generated through gsn_csm_hov.
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Basically, I am trying to draw few reference lines (corresponding to major volcanic eruptions) in a series of time vs longitude plots, generated by using gsn_attach_plots. Every time I set the relevant resource, I obtain the following warning:
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warning:gsnYRefLine is not a valid resource in Windstress_timeseries_contour at this time
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I managed to obtain a decent result (see figure attached) by including a bunch of gsn_add_polyline commands in the code, but I'd like to know if there is a more elegant way to implement that, or either a way to use gsnYRefLine in a gsn_csm_hov plot. Any suggestions? Did I miss anything?
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Best regards,
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Giorgio
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