[ncl-talk] Help with line labels

[Adam Phillips]

Hi Laura,
I just looked at the resources I have set in the past to get numerous line
labels on plots:
sres at cnLineLabelPlacementMode = "Constant"   ;Default is randomized
sres at cnLineLabelFontHeightF = 0.02       ;Size of labels
sres at cnLineDashSegLenF = 0.35          ;Spacing between labels
sres at cnLineLabelInterval = 1        ;Label every line

Give those a shot and let ncl-talk know the result.
Adam

On Fri, Dec 15, 2017 at 5:24 PM, Laura Fowler <laura at ucar.edu> wrote:

> Hi Adam:
>
> Thanks for sending me an e-mail earlier (to which I replied). As an
> experiment, I reverted to ncl choosing the levels instead of choosing
> the levels using "Explicit Levels". As expected, the new plot shows a
> bunch of contour lines, but without any labels. I also added the lines
> draw(plot) and frame(wks). That did not help either. So I am really
> baffled as why ncl refuses to add labels to my plot.
>
> Thanks,
> Laura
>
>
>
>
> On Fri, Dec 15, 2017 at 4:28 PM, Adam Phillips <asphilli at ucar.edu> wrote:
> > Hi Laura,
> > I believe NCL will limit the drawing of line labels if it believes they
> will
> > come close to overlapping, although in this case I'm not sure why it
> doesn't
> > simply draw one for each line.
> > See example #5 here:
> > http://www.ncl.ucar.edu/Applications/contourLab.shtml#ex5
> > and try setting cnLineLabelPlacementMode = "constant"
> > and see if that helps. Other examples show how to make sure labels are
> drawn
> > on every line (as opposed to the default behavior of skipping every other
> > one.), along with other modifications.
> > Adam
> >
> > On Fri, Dec 15, 2017 at 4:16 PM, Laura Fowler <laura at ucar.edu> wrote:
> >>
> >> Hello:
> >>
> >> I have been fussing for quite a while on how to draw labels on the
> >> contour line of the attached plot. The 3 contours show the resolution
> >> of my variable-resolution mesh. The red, blue, and black contours
> >> correspond to a resolution of 4.8 km, 9.6, and 14.4 km, respectively.
> >> I am not understanding why I am unable to add at least one label per
> >> contour?
> >>
> >> sres = True
> >>
> >> sres at gsnDraw          = False
> >> sres at gsnFrame         = False
> >> sres at gsnMaximize      = False
> >> sres at cnFillMode       = "AreaFill"
> >> sres at cnFillOn         = False
> >> sres at cnLinesOn        = True
> >> sres at cnLineLabelsOn   = True
> >> sres at cnLineThicknessF = 3.4
> >> sres at cnInfoLabelOn    = False
> >>
> >> sres at cnLevelSelectionMode = "ExplicitLevels"
> >> sres at cnLevels             = (/4.8,9.6,14.4/)
> >> sres at cnMonoLineColor      = False
> >> sres at cnLineColors         = (/"red","blue","black"/)
> >> sres at cnMonoLevelFlag      = True
> >> sres at cnLevelFlag         = "LineAndLabel"
> >>
> >> There must be something I am missing, or I am getting confused between
> >> sres at cnLevelFlag and sres at cnLevelFlags, but I just can't make it work?
> >> I know that it may be a little finnicky to add labels at times, ....
> >> Would somebody be able to help me out so that I do not have to add
> >> those labels in PowerPoint. If interested, my entire ncl script is in
> >>
> >> /glade2/scratch2/laura/MPAS.PacificOcean/plots.
> centeredPacificOceanMesh.15-3km.20151129-20151231
> >> (see global_mean.precipitation.ncl).
> >>
> >>
> >> Many thanks,
> >> Laura
> >>
> >>
> >>
> >>
> >>
> >> --
> >>
> >> !-----------------------------------------------------------
> --------------------------------------------------
> >> Laura D. Fowler
> >> Mesoscale and Microscale Meteorology Division (MMM)
> >> National Center for Atmospheric Research
> >> P.O. Box 3000, Boulder CO 80307-3000
> >>
> >> e-mail: laura at ucar.edu
> >> phone: 303-497-1628
> >>
> >>
> >> !-----------------------------------------------------------
> --------------------------------------------------
> >>
> >> _______________________________________________
> >> ncl-talk mailing list
> >> ncl-talk at ucar.edu
> >> List instructions, subscriber options, unsubscribe:
> >> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
> >>
> >
> >
> >
> > --
> > Adam Phillips
> > Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
> > www.cgd.ucar.edu/staff/asphilli/   303-497-1726
> >
>
>
>
> --
> !-----------------------------------------------------------
> --------------------------------------------------
> Laura D. Fowler
> Mesoscale and Microscale Meteorology Division (MMM)
> National Center for Atmospheric Research
> P.O. Box 3000, Boulder CO 80307-3000
>
> e-mail: laura at ucar.edu
> phone: 303-497-1628
>
> !-----------------------------------------------------------
> --------------------------------------------------
>



-- 
Adam Phillips
Associate Scientist,  Climate and Global Dynamics Laboratory, NCAR
www.cgd.ucar.edu/staff/asphilli/   303-497-1726

<http://www.cgd.ucar.edu/staff/asphilli>
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