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Re: help with cgDrawVectors in write_gif procedure [message #91096 is a reply to message #91094] Wed, 03 June 2015 05:45 Go to previous messageGo to previous message
Helder Marchetto is currently offline  Helder Marchetto
Messages: 520
Registered: November 2011
Senior Member
On Wednesday, June 3, 2015 at 2:39:27 PM UTC+2, g.na...@gmail.com wrote:
> I tried the following but I always get the same error: OPENW: Filename argument must be a scalar string: FILE.
>
> for i=0L, n-1 do begin
> cgDisplay, 500, 550
> Image = BYTSCL(Image, min=0.,max=160.)
> cgimage,Reform(Image[i,*,*])
> cgDrawVectors, REFORM(VX[i,*,*]), REFORM(VY[i,*,*]), pos_x, pos_y,VECCOLORS='yellow', /ORDERED, overplot = 1
> write_gif,file, Reform(Image[i,*,*]), /multiple
> endfor
>
> write_gif, file, /close

Hi,
when you get an error that says:
"OPENW: Filename argument must be a scalar string: FILE."
you should check if your variable file is a string or a scalar. In case you're doubting... it has to be a scalar.
Maybe use file[i]?

Cheers,
Helder

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