[ncl-talk] Disappearing Dots (Revisited)

Tue Jan 14 12:47:15 MST 2020

Hi Adam, Rasheed.

In both cases, I call the function within a loop.  The only difference is
whether I refer to array(i) or arr_0, arr_1... n.

In any case, I will try Rashed's version.

Barry

On Tue, Jan 14, 2020 at 9:06 PM Adam Phillips <asphilli at ucar.edu> wrote:

> Hi Barry,
> If I had to guess, it is that the arrow function writes the
> gsn_add_polyline output as attributes named arr,arr1, and arr2 to the plt
> array that is to be returned by the function. If you call the function
> multiple times and pass all the graphical output to the same logical array
> named "array", each time you call arrow, array at arr, array at arr1 and
> array at arr2 will get overwritten.  To get around this, you should alter
> the arrow function to use the unique_string function.
> https://www.ncl.ucar.edu/Document/Functions/Built-in/unique_string.shtml
>
> For an example of how to do this, see polymarker example #18:
> https://www.ncl.ucar.edu/Applications/polyg.shtml#ex18
>
> For example, change this:
> plt at arr = gsn_add_polyline(wks,plt,xpts,ypts,res)
> to this:
> str = unique_string("arr")
> plt@$str$ = gsn_add_polyline(wks,plt,xpts,ypts,res)
>
> and do the same for the other two calls to gsn_add_polyline.
> Hope that helps!
> Adam
>
>
> On Tue, Jan 14, 2020 at 9:45 AM Barry Lynn via ncl-talk <ncl-talk at ucar.edu>
> wrote:
>
>> Hi:
>>
>> I have a bit of a mystery:
>>
>> I have a loop where I am calling gsn_add_polymarker. I created an array
>> (dum_b(n_calls)) so I could plot the markers within the loop.
>>
>> dum_b(i) = gsn_add_polymarker(wks,plot,lon_old(i),lat_old(i),mkres)
>>
>>
>> However, when I call:
>>
>>
>> array(i) = arrow(wks,plot,xpts,ypts,mkres)
>>
>>
>> I am not able to make the lines with the arrows (more than once).
>>
>>
>> warning:TransformPostDraw: tfPolyDrawList element 1 is invalid
>>
>>
>> Yet, if I call the same with
>>
>>
>> arr_0 = arrow...
>>
>>
>> arr_1 = arrow...
>>
>>
>> up to n_calls, I have no problem.
>>
>>
>> If someone can solve the mystery, I would be curious to find out the
>> reason for this "strange" behavior.
>>
>>
>> https://www.ncl.ucar.edu/Support/talk_archives/2010/att-1344/arrow.ncl
>>
>> On Mon, Jul 8, 2019 at 12:13 PM Barry Lynn <barry.h.lynn at gmail.com>
>> wrote:
>>
>>> Hi:
>>>
>>> That was absolutely the correct solution -- thank you.
>>>
>>> Are you aware of a way to increase the spacing between maps?  I am using
>>> wrf resources so this is very obtuse.
>>>
>>> Barry
>>>
>>> On Mon, Jul 8, 2019 at 10:44 AM Rashed Mahmood <rashidcomsis at gmail.com>
>>> wrote:
>>>
>>>> Hi Barry,
>>>> A quick look suggests that it may be related to not specifying unique
>>>> ids for markid and textid:
>>>>     markid = gsn_add_polymarker(wks,plots(0),lon,lat,mkres)
>>>>     textid = gsn_add_text(wks,plots(0),cities,lon,lat,txres)
>>>>
>>>> Next lines should have,
>>>> markid*1 *= gsn_add_polymarker(wks,plots(0),lon,lat,mkres)
>>>> textid*1* = gsn_add_text(wks,plots(0),cities,lon,lat,txres)
>>>>
>>>> and so on...
>>>>
>>>> Cheers
>>>>
>>>> Rashed
>>>>
>>>>
>>>> On Mon, Jul 8, 2019 at 7:51 AM Barry Lynn via ncl-talk <
>>>> ncl-talk at ucar.edu> wrote:
>>>>
>>>>> Hello:
>>>>>
>>>>> For some reason, the markid only appears on the last graph, but not
>>>>> the first two.  Yet, the "call" to each is the same.  I had this problem in
>>>>> other programs I wrote.
>>>>>
>>>>> If you have a suggestion, thank you,
>>>>>
>>>>> Barry
>>>>> --
>>>>> Barry H. Lynn, Ph.D
>>>>> Senior Associate Scientist, Lecturer,
>>>>> The Institute of the Earth Science,
>>>>> The Hebrew University of Jerusalem,
>>>>> Givat Ram, Jerusalem 91904, Israel
>>>>> Tel: 972 547 231 170
>>>>> Fax: (972)-25662581
>>>>>
>>>>> C.E.O, Weather It Is, LTD
>>>>> Weather and Climate Focus
>>>>> http://weather-it-is.com
>>>>> Jerusalem, Israel
>>>>> Local: 02 930 9525
>>>>> Cell: 054 7 231 170
>>>>> Int-IS: x972 2 930 9525
>>>>>
>>>>> _______________________________________________
>>>>> ncl-talk mailing list
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>>>>
>>>>
>>>
>>> --
>>> Barry H. Lynn, Ph.D
>>> Senior Associate Scientist, Lecturer,
>>> The Institute of the Earth Science,
>>> The Hebrew University of Jerusalem,
>>> Givat Ram, Jerusalem 91904, Israel
>>> Tel: 972 547 231 170
>>> Fax: (972)-25662581
>>>
>>> C.E.O, Weather It Is, LTD
>>> Weather and Climate Focus
>>> http://weather-it-is.com
>>> Jerusalem, Israel
>>> Local: 02 930 9525
>>> Cell: 054 7 231 170
>>> Int-IS: x972 2 930 9525
>>>
>>>
>>
>> --
>> Barry H. Lynn, Ph.D
>> Senior Associate Scientist, Lecturer,
>> The Institute of the Earth Science,
>> The Hebrew University of Jerusalem,
>> Givat Ram, Jerusalem 91904, Israel
>> Tel: 972 547 231 170
>> Fax: (972)-25662581
>>
>> C.E.O, Weather It Is, LTD
>> Weather and Climate Focus
>> http://weather-it-is.com
>> Jerusalem, Israel
>> Local: 02 930 9525
>> Cell: 054 7 231 170
>> Int-IS: x972 2 930 9525
>>
>> _______________________________________________
>> ncl-talk mailing list
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>
>
>
> --
> 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>
>

-- 
Barry H. Lynn, Ph.D
Senior Associate Scientist, Lecturer,
The Institute of the Earth Science,
The Hebrew University of Jerusalem,
Givat Ram, Jerusalem 91904, Israel
Tel: 972 547 231 170
Fax: (972)-25662581

C.E.O, Weather It Is, LTD
Weather and Climate Focus
http://weather-it-is.com
Jerusalem, Israel
Local: 02 930 9525
Cell: 054 7 231 170
Int-IS: x972 2 930 9525
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