Re: Plans for gnuplot version 5 [per-line ranges]

[Karl-Friedrich R. <mai...@gm...>]

On 22.04.2014 08:13, Tait wrote:
> In the current versions (4.6p3 or p5), the initial []-enclosed values
> are taken as the overall x- and y- range.
>   plot [5:11][3:12] x, x/2+4
> is equivalent to
>   set xrange [5:11]; set yrange [3:12]; plot x, x/2+4
> and a range like [7:9] before the x/2+4 is a syntax error.
> 
> Changing this as outlined above (and apparently as-implemented in
> CVS?) is incompatible because now the [3:12] above would be a syntax
> error* and the [5:11] would apply only to the x and not to the x/2+4
> line, and the overall plot x-range is still presumably at its previous
> setting, or default [-10:10].

As far as i can see, the behaviour in 50 ist absolutely identical
from the point of 4.6, also with your example.

But the new syntax with the "sample" keyword looks rather sketchy to me:

 plot sample [-1:0] -x, [0:1] x

Wouldn´t backward compatibility also be achieved by adding a keyword
to "set xrange", e.g. "set xrange [0:1] axislength", meaning that
the sampling is to be done per-line, and the axis length be taken
from xrange?

Oh, and i noted that replot still doesn´t accept an explicit range,
even in "per-line" mode. Would that be possible?

  Karl