Re: Problem retuning graphic object from user defined function

Dear Mohamed,

I'm not sure what this code is all about:

> plot=plot1
> return (plot)
> end

But you might want to try returning "plot1" instead of "plot". There's no need for you to assign "plot1" to "plot" and then return "plot".

--Mary

On Sep 9, 2013, at 12:05 PM, Mohamed Abdel Kader <m.abdelkader@cyi.ac.cy> wrote:

> Dear All,
> I would like to make a figure of different scatter plots super-imposed a global map. I have a user defined function that generates the scatter plots and I return the scatter plot graphic object. The returned graphic object has missing value.
> I have to do in that way since the scatter plot is highly customized and it's being called many times from different scripts. So, I would like to keep one scatter plot script. Could you please help me on solving this problem.
>
> I attached parts from the script.
> P.S.: The scatter function works fine as standalone
>
> Thanks a lot and let me know if you need more information.
>
> ========================================================================================================================
> Scatter plot function:
> function Plot_Scatter_function(x_title:string,y_title:string,data_x:numeric,data_y:numeric,f_name:string,data_set_string:string, ps_op:logical, plot:graphic)
> local plot1, plot2
> begin
> .
> .
> .
> . "many commands"
> .
> .
> wks = gsn_open_wks("eps", f_name )
>
> plot1 = gsn_csm_xy (wks,ndtooned(data_x),ndtooned(data_y),res)
> plot2 = gsn_csm_xy (wks,(/res@trXMinF,res@trXMaxF/),(/res@trYMinF,res@trYMaxF/),res2)
>
> overlay(plot1,plot2)
> draw(plot1)
> frame(wks)
> print(plot1)
> plot=plot1
> return (plot)
> end
>
> the print out from scatter function
> Variable: plot
> Type: obj
> Total Size: 4 bytes
> 1 values
> Number of Dimensions: 1
> Dimensions and sizes: [1]
> Coordinates:
> Number Of Attributes: 2
> dataspec : /EMAC_map_scatter_____tmp_data xyDataSpecClass 89
> data : /EMAC_map_scatter_____tmp_data coordArraysClass 67
> (0) /EMAC_map_scatter_____tmp_xy xyPlotClass 88
> ========================================================================================================================
>
> Parent script:
> .
> .
> .
> .
> dum_poly = new(NREG,graphic)
>
> do n=0,NREG-1
> dum_poly(n)= Plot_Scatter_function(x_title,y_title,data_xx,data_yy,f_name+"_____tmp",data_set_string, ps_op,dum_poly(n))
> ann = gsn_add_annotation (map,dum_poly(n),amres)
> end do
> .
> .
> .
> .
> .
> .
> end
>
> the message error
>
> warning:NhlAddAnnotation: bad HLU id passed in, ignoring it
> fatal:_NclAddHLURef: internal error: ncl object 647412112 does not exist for vname anno_id
> fatal:_NclAddHLURef: internal error: ncl object 647412112 does not exist for vname ann
>
> The print out of dum_poly(n): from the Parent script.
> Variable: dum_poly
> Type: obj
> Total Size: 4 bytes
> 1 values
> Number of Dimensions: 1
> Dimensions and sizes: [1]
> Coordinates:
> Number Of Attributes: 3
> data : -1
> dataspec : -1
> _FillValue : -1
> (0) -1
> ========================================================================================================================
>
>
>
>
>
>
>
> Best Regards
> Mohamed M. Abdel Kader
> Atmosphere and Climate Modelling Group
> Research Assistant/PhD student
> Environmental & Atmospheric Sciences
> Max-Planck Institute for Atmospheric chemistry, Germany
> The Cyprus Institute, Cyprus
> 20 Constantinou Kavafi Street
> P.O. Box: 27456
> Nicosia 2121, Cyprus
> Tel. +357 222 08679
> Fax. +357 222 08625
> Mobile: +357 992 62108
> e-mails: m.abdelkader@cyi.ac.cy
> mmkader@gmail.com
> Skype: mmkader
>
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Received on Sun Sep 15 20:12:45 2013