[ncl-talk] switch from manual to automated contour levels in panels

[Jack Ogaja]

Thanks. I didn’t see that. Mira should try that then.

Jack

> On 27 Aug 2015, at 16:01, Alan Brammer <abrammer at albany.edu> wrote:
> 
> cnLevelSpacingF still applies jn AutomaticLevels.  That is the resource you want to delete if you want NCL to also choose the spacing as well as the min/max levels.  You don't need to delete the selectionMode before resetting it.  See below for the documentation on cnLevelSpacingF. 
> https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSpacingF <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSpacingF>
> 
> 
> cnLevelSpacingF
> When the cnLevelSelectionMode <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSelectionMode> is ManualLevels or when the cnLevelSelectionMode <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSelectionMode> is AutomaticLevels, andcnLevelSpacingF <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSpacingF> is explicitly set, cnLevelSpacingF <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSpacingF> determines the spacing between contour intervals. Otherwise, theContourPlot <https://www.ncl.ucar.edu/Document/HLUs/Classes/ContourPlot.shtml> object sets the value of cnLevelSpacingF <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSpacingF> based on the contour levels actually chosen. When thecnLevelSelectionMode <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSelectionMode> is ExplicitLevels, cnLevelSpacingF <https://www.ncl.ucar.edu/Document/Graphics/Resources/cn.shtml#cnLevelSpacingF> will be set to the arithmetic average of the spacing between levels.
> Default: 5.0
> 
> 
> On Thu, Aug 27, 2015 at 7:35 AM, Jack Ogaja <jack.ogaja at gmail.com <mailto:jack.ogaja at gmail.com>> wrote:
> Try,
> 
>     delete(qfres at cnLevelSelectionMode)   ;<=== Delete the resource before resetting
>     qfres at cnLevelSelectionMode = “AutomaticLevels"
> 
> Jack
> 
> > On 27 Aug 2015, at 05:01, mberdahl at envsci.rutgers.edu <mailto:mberdahl at envsci.rutgers.edu> wrote:
> >
> > Hi all,
> >
> > I'm trying to make a 3-panel plot, where the top two panels have user
> > define contour intervals (which I can make work, I think), but the bottom
> > panel I'd like to have automatically generated.  The way I've tried is to
> > simply change the setting the LevelSelectionMode back to "AutomaticLevels"
> > before calling that final plot, but it doesn't seem to change back to
> > being automatic.   Here is a snippet of my code showing how I try to do
> > this.  Any recommendations on how to switch between different modes for
> > automatic and manual contour selection for different panels is greatly
> > appreciated.
> >
> > Best,
> > Mira
> >
> >
> >
> >
> > qfres at cnLevelSelectionMode = "ManualLevels"   ; set contour levels manually
> > qfres at cnMinLevelF = 0.                                ; set hte min contour level
> > qfres at cnMaxLevelF = 1.                                ; set the max contour level
> > qfres at cnLevelSpacingF = 0.1                   ; set the contour interval
> >
> >
> > contour_qf_hi = gsn_csm_contour(wks,qAvgTime_hi,qfres)
> > contour_qf_lo = gsn_csm_contour(wks,qAvgTime_lo,qfres)
> >
> > plot(0) = gsn_csm_contour(wks,qAvgTime_hi,qfres)
> > plot(1) = gsn_csm_contour(wks,qAvgTime_lo,qfres)
> >
> > qfres at cnLevelSelectionMode = "AutomaticLevels"        ; set it back to automatic
> > level contour spacing for the difference plot.
> > contour_qf_diff = gsn_csm_contour(wks,diff_q,qfres)
> > plot(2) = gsn_csm_contour(wks,diff_q,qfres)
> >
> >
> >
> >
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