[ncl-talk] contour & vector overlay map

[Dennis Shea]

As noted by Karin, the dimensionality of the arguments you are passing is
not acceptable.

[1]
u = f->u({150:165},{15:18},:,:)
v = f->v({150:165},{15:18},:,:)

printVarSummary(u)    ; **look** at this.

The variable is 4-dimensional

[2]
You use these and speed in

 contours = gsn_csm_contour(wks,speed,cnres)
 vectors  = gsn_csm_vector(wks,u,v,vcres)

Please *read* the documentation for functions you are using:

http://www.ncl.ucar.edu/Document/Graphics/Interfaces/gsn_csm_contour.shtml

Note what it shows for the 'dat' argument

*data*

The data to contour; ****must be one or two-dimensional.****

You are using 4D arrays. That is what the error message is telling you

[3]

  do nt=...

      do kl=...


  contours = gsn_csm_contour(wks,speed(nt,kl,:,:),cnres)
  vectors  = gsn_csm_vector(wks,u(nt,kl,:,:),v(nt,kl,:,:),vcres)

;---Overlay vectors and contours on map
  overlay(map,contours)
  overlay(map,vectors)

;---Drawing the map will draw contours and vectors too.
  draw(map)
  frame(wks)

   end do
end do


On Mon, Jun 15, 2015 at 8:23 AM, Karin Meier-Fleischer <
meier-fleischer at dkrz.de> wrote:

>  Hi,
>
> the error message is telling you what is wrong. Your speed, u and v
> variable
> have more than 2 dimensions. Do a printVarSummary to get variable
> information.
>
> Bye,
> Karin
>
> Am 15.06.15 um 16:01 schrieb saeed bayat:
>
>  Dear NCL users
>  I want to plot a map which includes contour and vector (or streamline)
> overlay. I prepared a ncl script that has error.:
>  gsn_csm_contour: Fatal: the input data array must be 1D or 2D
> fatal:Illegal right-hand side type for assignment
> fatal:["Execute.c":8575]:Execute: Error occurred at or near line 45 in
> file cn_vc.ncl
>
>  Please find attached script to find more about the script and help me to
> solve the problem.
>
>  Best Regards
>  --
>    Abdolhalim Bayat
> Ph.D Candidate of Synoptic Climatology
> University of Tehran (Iran)
>
>
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>
> --
> Dipl. Geophys. Karin Meier-Fleischer
> Visualization
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>
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