[ncl-talk] Legend as a break in curve in a time-series plot

Adam Phillips asphilli at ucar.edu
Thu Nov 15 10:03:12 MST 2018 

Hi Tabish,
In this case there's not much difference between the procedures for
creating a single plot to be drawn or creating a single plot to be paneled,
the keys are setting gsnDraw/gsnFrame = False and setting up a graphic
array to house all 40 plots (even though you'll only end up drawing 4 of
them):

res = True
res at gsnDraw = False
res at gsnFrame = False
.......   ; set other resources
plot = new((/4,10/),graphic)
tt = fspan(.5,.9,10)    ; you will likely want to modify this
do gg = 0,9
    res at xyLineDashSegLenF = tt(gg)
    plot(0,gg) = gsn_csm_xy(wks,x,arr(gg,:),res)
    if (gg.ge.1) then
       overlay(plot(0,0),plot(0,gg))
    end if
end do
; repeat do loop for other four plots, filling plot(1,:), then plot(2,:) etc

panres = True
panres at gsnMaximize = True
gsn_panel(wks,plot(:,0),(/2,2/),panres)

Hope that helps!
Adam

On Thu, Nov 15, 2018 at 8:07 AM Tabish Ansari <tabishumaransari at gmail.com>
wrote:

> Hi Adam,
>
> I'm able to get the desired plot using the overlay method - thanks!
> Another issue is that, I want similar (overlaid) plots, say 4 of them,  as
> panels.
> How can I do that - since each plot is not a single plot but a combination
> of 10 plots.
>
> Thanks
>
> Tabish
>
> Tabish U Ansari
> PhD student, Lancaster Environment Center
> Lancaster Univeristy
> Bailrigg, Lancaster,
> LA1 4YW, United Kingdom
>
>
> On Wed, 14 Nov 2018 at 23:55, Tabish Ansari <tabishumaransari at gmail.com>
> wrote:
>
>> Hi Adam,
>>
>> Thanks. It worked.
>> Only issue was that since the 10 lines have a different maximum value and
>> the y-axis was set according to the
>> first plot (line 1) while rest of them were overlayed on it, some of them
>> were cut at the top. This was fixed
>> when I explicitly set the y axis limits (res at trYMaxF =  50). The
>> resultant plot looks nice.
>>
>> There were some warnings though:
>> warning:NhlDraw: cannot draw Plot Member, ID 71, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 112, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 59, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 29, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 163, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 204, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 245, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 156, independently
>> warning:NhlDraw: cannot draw Plot Member, ID 243, independently
>>
>> Does this only refer to the rest of the 9 plots which were overlayed?
>> Or is it something to worry about?
>>
>> Cheers,
>>
>> Tabish
>> I got some warnings though:
>>
>> Tabish U Ansari
>> PhD student, Lancaster Environment Center
>> Lancaster Univeristy
>> Bailrigg, Lancaster,
>> LA1 4YW, United Kingdom
>>
>>
>> On Wed, 14 Nov 2018 at 23:02, Adam Phillips <asphilli at ucar.edu> wrote:
>>
>>> Hi Tabish,
>>> To set xyLineDashSegLenF individually for each line, you would have to
>>> plot each line individually, and overlay lines 2-10 back onto the plot
>>> created for line 1:
>>>
>>> res = True
>>> res at gsnDraw = False
>>> res at gsnFrame = False
>>> plot = new(10,graphic)
>>> tt = fspan(.5,.9,10)    ; you will likely want to modify this
>>> do gg = 0,9
>>>     res at xyLineDashSegLenF = tt(0)
>>>     plot(gg) = gsn_csm_xy(wks,x,arr(gg,:),res)
>>>     if (gg.ge.1) then
>>>        overlay(plot(0),plot(gg))
>>>     end if
>>> end do
>>>
>>> Adam
>>>
>>> On Wed, Nov 14, 2018 at 3:54 PM Tabish Ansari <
>>> tabishumaransari at gmail.com> wrote:
>>>
>>>> Hi Adam,
>>>>
>>>> Thanks.
>>>>
>>>> Since all the 10 lines are supplied to a single gsn_csm_xy which has
>>>> only one "res", how can I assign a different res at xyLineDashSegLenF for
>>>> each line?
>>>> Can I supply it as an array?
>>>> Is that possible?
>>>>
>>>> Cheers,
>>>>
>>>> Tabish
>>>> Tabish U Ansari
>>>> PhD student, Lancaster Environment Center
>>>> Lancaster Univeristy
>>>> Bailrigg, Lancaster,
>>>> LA1 4YW, United Kingdom
>>>>
>>>>
>>>> On Wed, 14 Nov 2018 at 22:34, Adam Phillips <asphilli at ucar.edu> wrote:
>>>>
>>>>> Hi Tabish,
>>>>> Yes, see:
>>>>>
>>>>> http://www.ncl.ucar.edu/Document/Graphics/Resources/xy.shtml#xyLineDashSegLenF
>>>>> Try a value around .5. The higher the value the more space between
>>>>> labels on an individual line.
>>>>> Adam
>>>>>
>>>>> On Wed, Nov 14, 2018 at 3:26 PM Tabish Ansari <
>>>>> tabishumaransari at gmail.com> wrote:
>>>>>
>>>>>> Thanks, it worked.
>>>>>>
>>>>>> The only issue now is that since I have 10 lines within a single xy
>>>>>> plot, it leads to
>>>>>> several labels overlapping with each other because they're labelled
>>>>>> exactly at the
>>>>>> same length intervals.
>>>>>>
>>>>>> Long shot but any chances that the user can control this spacing
>>>>>> where the labels are
>>>>>> written out for each line?
>>>>>>
>>>>>> Thanks
>>>>>>
>>>>>> Tabish
>>>>>> Tabish U Ansari
>>>>>> PhD student, Lancaster Environment Center
>>>>>> Lancaster Univeristy
>>>>>> Bailrigg, Lancaster,
>>>>>> LA1 4YW, United Kingdom
>>>>>>
>>>>>>
>>>>>> On Wed, 14 Nov 2018 at 22:16, Adam Phillips <asphilli at ucar.edu>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Tabish,
>>>>>>> A good find with xy_14.ncl
>>>>>>> <http://www.ncl.ucar.edu/Applications/Scripts/xy_14.ncl>, but it
>>>>>>> looks to me like xyExplicitLabels allows one to put in an array of strings.
>>>>>>> Thus, did you try something like this: res at xyExplicitLabels =
>>>>>>> (/"Line 1","Line 2"/)
>>>>>>> Adam
>>>>>>>
>>>>>>> On Wed, Nov 14, 2018 at 2:54 PM Tabish Ansari <
>>>>>>> tabishumaransari at gmail.com> wrote:
>>>>>>>
>>>>>>>> Hi
>>>>>>>>
>>>>>>>> I think there's an example on the ncl webpage : xy_14.ncl
>>>>>>>> but it only explains how to label a single line. I have got 10 lines
>>>>>>>> in my plot and want to label them as run1, run2, run3.....run10,
>>>>>>>> for example.
>>>>>>>>
>>>>>>>> Cheers,
>>>>>>>>
>>>>>>>> Tabish
>>>>>>>> Tabish U Ansari
>>>>>>>> PhD student, Lancaster Environment Center
>>>>>>>> Lancaster Univeristy
>>>>>>>> Bailrigg, Lancaster,
>>>>>>>> LA1 4YW, United Kingdom
>>>>>>>>
>>>>>>>>
>>>>>>>> On Wed, 14 Nov 2018 at 21:01, Tabish Ansari <
>>>>>>>> tabishumaransari at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hi
>>>>>>>>>
>>>>>>>>> I'm creating a time-series plot with 10 curves within it.
>>>>>>>>> It is difficult to select 10 different colors for these 10 curves
>>>>>>>>> and then create a corresponding legend, which will also take a lot
>>>>>>>>> of
>>>>>>>>> extra space in the plot.
>>>>>>>>>
>>>>>>>>> Is there a way I can just name these curves as a break in them,
>>>>>>>>> just like
>>>>>>>>> when you use numbered contours in a contour plot?
>>>>>>>>>
>>>>>>>>> Thanks
>>>>>>>>>
>>>>>>>>> Tabish
>>>>>>>>>
>>>>>>>>> Tabish U Ansari
>>>>>>>>> PhD student, Lancaster Environment Center
>>>>>>>>> Lancaster Univeristy
>>>>>>>>> Bailrigg, Lancaster,
>>>>>>>>> LA1 4YW, United Kingdom
>>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> 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
>>>>>>>
>>>>>>> <http://www.cgd.ucar.edu/staff/asphilli>
>>>>>>>
>>>>>>
>>>>>
>>>>> --
>>>>> 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>
>>>>>
>>>>
>>>
>>> --
>>> 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>
>>>
>>

-- 
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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