Re: update x-y ranges?

[Hans-Bernhard B. <HBB...@t-...>]

Am 28.11.2024 um 21:05 schrieb Leo Butler:

> w filledcurves~a xy=~a,~a lc ~a axis ~a
> 
> (the ~a are place holder for values, like %s in a printf template).
> 
> 
> 1. Was this syntax ever supported by gnuplot? If so, what did it do and
>     how can the same effect be achieved in more recent gnuplots?

I think that would depend on what the very first of those ~a thingies 
expands to.

The documented syntax and the existing demos both suggest the 'xy=' part 
to come rather immediately after "filledcurves".  The syntax only allows 
keywords like 'above' or 'below' in that place.  See "help with 
filledcurves" on current git head:

> Syntax for 2D:
> 
>      plot f(x) with filledcurves [option]
>      plot DATA using 1:2    with filledcurves [option]
>      plot DATA using 1:2:3  with filledcurves [option]
> 
>  where the option can be one of the following
> 
>      closed
>      {above|below} x1 x2  y r=<a> xy=<x>,<y>
>      between

That would indicate this fraction of the command line rejected by 
gnuplot (from [1])

	w filledcurves fillstyle solid 0.1 xy=-1.0,0.0

would probably still work if it hat been

	w filledcurves xy=-1.0,0.0 fillstyle solid 0.1

instead.

> 2. Assuming the syntax was supported, when was support removed?

That particular syntax was never explicitly supported.  It may just have 
happened to work anyway.  And now it doesn't.

> [1] - https://sourceforge.net/p/maxima/code/ci/master/tree/share/draw/gnuplot.lisp#l902