Re: pre-release testing version of gnuplot 5.2.3

[sfeam <sf...@us...>]

On Thursday, 26 April 2018 21:02:12 Dima Kogan wrote:
> sfeam via gnuplot-beta <gnu...@li...> writes:
> 
> > I have uploaded a 5.2.3 tarball to the "testing" section of the
> > gnuplot files folder on SourceForge.
> 
> I found a bug earlier that I haven't yet got around to reporting or
> trying to fix. Just confirmed that it's still an issue with this new
> build. Would you mind taking a look before this release becomes
> official?
> 
> The bug: autoscaling of plots with any logscale axes doesn't work on a
> replot. For instance, the attached script produces reasonable
> autoscaling initially, but after a "replot", it is broken. This is
> significant because everyone using a tiling window manager ends up
> replotting at least once before looking at any plot.

I agree this is undesirable, but I don't see an immediate fix.
There are at least a couple of work-arounds however

1) Don't replot in-line data.  That didn't use to be possible at
   all and as you have found the change to allow it was imperfect.
   Put the data in a datablock instead.

2) Use writeback/restore:
	set xrange [*:*] writeback
	plot '-'
	... 
	set xrange restore
	replot
 
> I vaguely recall a discussion at some point in the past where we talked
> about the "replot" command just recalling the axis extents from the
> initial plot command if it is sure the data hasn't changed (which is
> true for inline data, such as here). Should we do that?

I vaguely recall that also but I don't remember the details.

I'll look into it. However I have a strong aversion to complicated
last-minute changes before a release.  If there's some stupid
error in the logic because of log scaling that might have a 
trivial fix.  But re-doing the way autoscale + replot works sounds
like a major change that I'd want to have tested in the development
version for a while before it went into a minor level release.

	cheers,

		Ethan