Re: auto-inrementing 'set output'

[Ethan M. <merritt@u.washington.edu>]

On Saturday, 03 September 2011, Mojca Miklavec wrote:
> Dear list,
> 
> I would like to know if there is any trick to create a lot of PNG
> images without calling "set output ..." for each of them.
> 
> If I use gnuplot with PostScript, PDF, any TeX-based on any
> interactive terminal, I get all the plots without having to call set
> output for each of them.

The PNG standard has no provision for multiple images in a single
output file.  There is a variant format MNG that does, but it has
never caught on.

The only "trick" I can think of is to do
    gnuplot> set term gif animate nooptimize
    gnuplot> set output 'all-in-one.gif'
and then afterwards split out all the individual image frames
into separate png images.
    [1] convert all-in-one.gif image.png
    [2] ls *.png
    image-0.png image-1.png image-2.png
   

	Ethan


> 
> I would like to be able to set something like
>     set output pattern "filename-%03d.png"
> and then just call "plot" without having to worry about filenames.
> 
> (Writing a script to generate plots is not an option and auto-insert
> "set output" is not an option.)
> 
> Have there ever been any plans about such functionality?
> 
> Thank you,
>     Mojca
> 
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