[ncl-talk] legend
David Bailey
dbailey at ucar.edu
Sat Mar 17 13:33:28 MDT 2018
I will just jump in here and say that I used it and it works great for me.
See the following plot:
http://webext.cgd.ucar.edu/B20TH/b.e20.BHIST.f09_g17.20thC.269_01/ice/b.e20.BHIST.f09_g17.20thC.269_01-obs/yrs1850-2005/obs/fm_icesat_barchart.png
Here is the code I used:
;
; Add a legend.
;
gres = True
gres at YPosPercent = 95. ; expressed as %, 0->100, sets position of top
border of legend
; when gres at Position is set to its default
setting of "Top" (Default = 95.)
gres at XPosPercent = 30. ; expressed as %, 0->100, sets position of left
border of legend(Default = 5.)
lineres = True
lineres at lgLineColors = (/"gray55","black"/) ; line colors
lineres at lgLineThicknesses = (/30,3/) ; line thicknesses
lineres at LineLengthPercent = 9. ; expressed as %,
0->100, length of line
textres = True
textres at lgLabels = labels ; legend labels (required)
textres at lgLabelFontHeights = (/0.010,0.010/)
res at tiMainString = "Spring (FM)"
plot1(0) = gsn_csm_xy (wks1,level(0:13),spring(1,:),res)
res at trYMaxF = 0.5
res at tiMainString = "Fall (ON)"
plot1(1) = gsn_csm_xy (wks2,level(0:13),fall(1,:),res)
plot1(0) = simple_legend(wks1,plot1(0),gres,lineres,textres)
plot1(1) = simple_legend(wks2,plot1(1),gres,lineres,textres)
draw(plot(0))
draw(plot(1))
draw(plot1(0))
draw(plot1(1))
overlay(plot(0),plot1(0))
overlay(plot(1),plot1(1))
frame(wks1)
frame(wks2)
Dave
On Sat, Mar 17, 2018 at 1:11 PM, Mary Haley <haley at ucar.edu> wrote:
> Sandro,
>
> On the same legend page that Rick pointed you to, you could also check out
> the "simple_legend" function that Adam Phillips created. Examples 16, 17,
> and 19 show how to use this function.
>
> If you need to draw the legend outside the plot, then simple_legend_ndc
> can be used. This function has not yet been released, so I've attached it
> here. You would need to load it with:
>
> load "./simple_legend_ndc.ncl"
>
> Examples 20 and 21 show how to use that function.
>
> --Mary
>
>
> On Sat, Mar 17, 2018 at 7:46 AM, Rick Brownrigg <brownrig at ucar.edu> wrote:
>
>> Hi,
>>
>> I now understand what you are saying. I'm not expert at this, but I
>> wonder if pmLegendWidthF is the resource you need (
>> http://ncl.ucar.edu/Document/Graphics/Resources/pm.shtml). There are
>> several examples that explicitly set this at:
>>
>> http://ncl.ucar.edu/Applications/legend.shtml
>>
>> If that does not help, please reply back to ncl-talk, as perhaps others
>> with more experience can offer advise.
>>
>> Rick
>>
>> On Fri, Mar 16, 2018 at 10:06 PM, Vattioni Sandro <
>> sandro.vattioni at outlook.com> wrote:
>>
>>> Hi Rick
>>>
>>> Thanks for your fast answer.
>>> Attached I’m sending you a screen-shot.
>>> I just want to decrease the length of the dash paterns in the legend. It
>>> looks kind of silly when they are so long. I tried to draw the desired
>>> outcome 😃
>>>
>>> Thank you very much for your help.
>>>
>>> Sandro
>>>
>>> *Von:* Rick Brownrigg <brownrig at ucar.edu>
>>> *Gesendet:* Freitag, 16. März 2018 23:34
>>> *An:* Vattioni Sandro <sandro.vattioni at outlook.com>
>>> *Cc:* ncl-talk at ucar.edu
>>>
>>> Hi Sandro,
>>>
>>> Can you post a picture of what you talking about? I am having trouble
>>> visualizing what the issue is... :-/
>>>
>>> Rick
>>>
>>> On Fri, Mar 16, 2018 at 9:15 PM, Vattioni Sandro <
>>> sandro.vattioni at outlook.com> wrote:
>>>
>>>> Dear Madam or Sir
>>>>
>>>> I wnat to draw a legend for my xy-plot in ncl, but the dash patern of
>>>> the line is very long compared to the text. I tried to make the dash
>>>> pattern shorter with lgLineDashSegLenF but it did not work. How can I
>>>> controll the length of the dash pattern using the legendClass?
>>>>
>>>> Kind regards,
>>>> Sandro
>>>>
>>>> legend = create "Legend" legendClass wks
>>>> "lgTitleString" : "Left Hand Side Column:
>>>> 10~F34~0~F~N-10~F34~0~F~S emission"
>>>> "vpXF" : 0.2 ; orientation on
>>>> page
>>>> "vpYF" : 0.15 ;0.48
>>>> "vpWidthF" : 0.1 ;0.3 ; width
>>>> "vpHeightF" : 0.12 ; height
>>>> "lgAutoManage" : True
>>>> "lgPerimOn" : False ; no perimeter
>>>> "lgItemCount" : 5 ; how many
>>>> "lgItemType" : "Lines"
>>>> "lgLabelStrings" : (/"Reference run","Continuous aerosol
>>>> emission","Continuous
>>>> "lgLabelsOn" : True ; no default
>>>> lables
>>>> "lgLabelOffsetF" : 0.0
>>>> "lgLineLabelFontHeightF" : 2.0
>>>> "lgLineDashSegLenF" : 0.01
>>>> "lgDashIndexes" : (/0,0,0,0,0/) ;4
>>>> "lgLineColors" : (/"black","blue","red","darkvi
>>>> olet","orange"/)
>>>>
>>>> end create
>>>>
>>>> draw(legend)
>>>>
>>>>
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>>>
>>
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--
David A Bailey
email: dbailey_at_ucar.edu
National Center for Atmospheric Research phone: 303-497-1737
PO Box 3000
fax : 303-497-1700
Boulder, CO 80307-3000
http://www.cgd.ucar.edu/staff/dbailey
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