[ncl-talk] polyg_29.ncl

[Adam Phillips]

Hi Jalal,
Ah, I forgot about one thing: You have 3 color filled fields that you'd
like to overlay, and if you overlay plot 3 over plot 1 all you will see is
plot 3. As you are coloring all values below a value of 1 white, I would
suggest setting all values less than 1 to @_FillValue:
PRC = where(PRC.lt.1,PRC at _FillValue,PRC)
Grid cells set to _FillValue are not color filled, so you will be able to
see multiple plots overlaid on one another. However, note that if two or
more of your arrays have values above 1 at the exact same grid point, you
will only see the latest plot to be overlaid. You can always try setting
semi-transparent colors as is shown in the RGBA section here:
http://www.ncl.ucar.edu/Applications/rgbacolor.shtml , but assuming you
have three distinct areas you should not need to worry about transparency.

Hope that helps!
Adam






On Mon, Apr 1, 2019 at 5:37 PM Md. Jalal Uddin <dmjalal90 at gmail.com> wrote:

> Thank you, sir, for your kind help. I am getting the same figure for both
> of without overlay and overlay. Please look at the attached figures that
> did not add whole circles rainfall.
> [image: without_overlay.png]
> [image: overlay.png]
>
> On Tue, Apr 2, 2019 at 12:47 AM Adam Phillips <asphilli at ucar.edu> wrote:
>
>> Hi Jalal,
>> You can use the overlay procedure
>> <http://www.ncl.ucar.edu/Document/Functions/Built-in/overlay.shtml>. But
>> note that overlay members cannot be created using a *_map plotting
>> function. So, for example, change this:
>>
>>   plot(nc) = gsn_csm_contour_map(wks,PRC,res)
>> end do
>> resP at gsnPanelMainString  = "Example: geolocation_circle, gc_inout:
>> radius="+  sprintf("%4.1f", srad(nr))+"km"
>> gsn_panel(wks,plot,(/1,2/),resP)
>>
>> to this:
>>
>> if (nc.eq.0) then
>>    plot(nc) = gsn_csm_contour_map(wks,PRC,res)
>> else
>>    plot(nc) = gsn_csm_contour(wks,PRC,res)
>>    overlay(plot(0),plot(nc))
>> end if
>> resP at gsnPanelMainString  = "Example: geolocation_circle, gc_inout:
>> radius="+  sprintf("%4.1f", srad(nr))+"km"
>> gsn_panel(wks,plot(0),(/1,1/),resP)      ; alternatively can just call
>> draw(plot(0)) followed by frame(wks)
>>
>> Adam
>>
>> On Sat, Mar 30, 2019 at 8:12 PM Md. Jalal Uddin <dmjalal90 at gmail.com>
>> wrote:
>>
>>> Hi all,
>>>
>>> In example page, polyg_29 shows precipitation plot for 3 cyclones centre
>>> separately. If I want to draw a precipitation plot for 3 cyclones centre
>>> together not separately, what should I do?
>>>
>>> Best Regards,
>>> Jalal
>>> --
>>> *Md. Jalal Uddin*
>>> MSc in Applied Meteorology (English Language)
>>> Nanjing University of Information, Science and Technology, China
>>> B.Sc. in Disaster Management (Hons.)
>>> Patuakhali Science and Technology University, Bangladesh.
>>> Cell: +8613260859092, +8801792052662
>>> Web: www.dmjalal90.weebly.com
>>> Facebook: jalal.hossen.39
>>> LinkedIn: https://bd.linkedin.com/in/md-jalal-uddin-80a026b0
>>> Twitter: dmjalal90
>>> Skype: dmjalal90
>>> _______________________________________________
>>> 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>
>>
>
>
> --
> *Md. Jalal Uddin*
> MSc in Applied Meteorology (English Language)
> Nanjing University of Information, Science and Technology, China
> B.Sc. in Disaster Management (Hons.)
> Patuakhali Science and Technology University, Bangladesh.
> Cell: +8613260859092, +8801792052662
> Web: www.dmjalal90.weebly.com
> Facebook: jalal.hossen.39
> LinkedIn: https://bd.linkedin.com/in/md-jalal-uddin-80a026b0
> Twitter: dmjalal90
> Skype: dmjalal90
>


-- 
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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