[ncl-talk] Error: gsn plot: All of the plots passed to gsn_panel appear to be invalid

[Dennis Shea]

When I 1st looked I thought you had left out some code so people would
focus on the graphics part.
It was pointed out to me that this was your entire code.

You allocated space for 12 plots via

      wks  = gsn_open_wks ("ps", "panel" )
      plot = new ( 12 , graphic)                    ; <=== all are
_FillValue

But you did not fill the graphical plot array with any contents

     do nmo=0,11
                 :
          plot(nmo) = .gsn...(wks,...,hres)
    end do







On Wed, Aug 6, 2014 at 6:58 PM, Dennis Shea <shea at ucar.edu> wrote:

> Did you read the gsn_panel documentation?
>
> https://www.ncl.ucar.edu/Document/Graphics/Interfaces/gsn_panel.shtml
>
> In particular,
>
> 	procedure gsn_panel (
> 		wks       : graphic,
> 		plots [*] : graphic,
> 		dims  [*] : integer,
> 		res   [1] : logical
> 	)
> *dims*
> An array of integers indicating the configuration of the plots on the
> frame.  *dims* can either be two integers representing the
> number of rows and columns of the paneled lots ....
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> Think
>
>  dims = (/nrow,ncol/)
>
> ====
>
> So, all you need is
>
>  pres = True
>
>  pres at gsnMaximize = True
>
> Then
>
>  gsn_panel(wks,plot,(/3,4/),pres)  ; 3 rows; each row having 4 plots
>
> or
>
>  gsn_panel(wks,plot,(/4,3/),pres)  ; 4 rows; each row having 3 plots
>
>
>
>
> On Wed, Aug 6, 2014 at 5:45 PM, Ipshita Majhi <ipmajhi at alaska.edu> wrote:
>
>> Hi,
>>
>> I am trying to plot 12 plots in one panel. Each column with 4 plots and
>> three columns like that. Here is the code, I would be grateful if you could
>> tell me where the error is. Thanking you in advance
>>  ===========================================
>> ;     To plot decadal plots
>> ; ===========================================
>> ;
>> ; Concepts illustrated:
>> ;   - Specifying how many plots to draw in each row
>> ;   - Left-justifying and centering paneled plots
>> ;
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>>
>> begin
>>
>>  ;=============================================
>> ; data processing
>> ;=============================================
>>  x=asciiread("~/Documents/PhD_June_2015/NCL_Moonsoon/Data_output/all_month_decade",(/13,12/),
>> "float")
>>  year_decadal=ispan(1880,2012,10)
>> ;==============================================
>> ; create plot
>> ;=============================================
>>
>>
>>  wks  = gsn_open_wks ("ps", "panel" )
>>  plot = new ( 12 , graphic)
>>
>>
>>  hres                          = True
>>  hres at gsnDraw                  = False
>>  hres at gsnFrame                 = False
>>
>>  hres at tiMainString             = "Decadal Mean"
>>
>>  hres at cnLevelSelectionMode     = "ManualLevels"     ; manual levels
>>  hres at cnMinLevelValF           = -10.
>>  hres at cnMaxLevelValF           =  10.
>>  hres at cnLevelSpacingF          = 2.
>>
>> ;==============================================
>> ; create panel
>> ;=============================================
>>  pres                 = True
>>  pres at gsnPanelRowSpec = True                   ; tell panel what order
>> to plt
>>  gsn_panel(wks,plot,(/4,4,4/),pres)
>>
>>  pres at gsnPanelCenter  = False
>>  gsn_panel(wks,plot,(/4,4,4/),pres)
>> end
>>
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>
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