On Saturday, 23 May 2015 01:56:30 AM Daniel J Sebald wrote:
> I notice that even though "reverse/noreverse" has been deprecated,
reverse/noreverse is deprecated only in the sense that its meaning
has been restricted to the originally documented case of autoscaling.
> the option setting "noreverse" appears in the list, i.e.:
>
> Terminal type set to 'qt'
> gnuplot> show xrange
>
> set xrange [ * : * ] noreverse nowriteback # (currently [-10.0000:10.0000] )
> Might it be better to leave out the "noreverse" value?
That tells you autoscaling on x will produce the 'normal' axis layout
with lower x values on the left side. If it said instead
> set xrange [ * : * ] reverse nowriteback # (currently [-10.0000:10.0000] )
that would indicate autoscaling will produce a layout with lower x values
on the right side.
>From "help set xrange":
The `reverse` option reverses the direction of an autoscaled axis. For example,
if the data values range from 10 to 100, it will autoscale to the equivalent of
set xrange [100:10]. The `reverse` flag has no effect if the axis is not
autoscaled. NB: This is a change introduced in version 4.7.
Ethan
> It would be a
> good "feature check" if the "noreverse" were no longer printed.
>
> Of course, now that some versions have been released that do print
> "noreverse", that sort of destroys the integrity of such a feature check.
>
> However, even this is problematic:
>
> gnuplot> set xrange [0:1] reverse
> gnuplot> show xrange
>
> set xrange [ 0.00000 : 1.00000 ] reverse nowriteback
>
> gnuplot> plot x
>
> The "show" function is indicating xrange is reversed when clearly it
> isn't. So one can't rely on a set/show combination to determine if
> reverse/noreverse is an acceptable syntax.
>
> Well, don't use "reverse" keyword is the lesson, but gnuplot still
> keeping track of reverse/noreverse and showing the option seems superfluous.
>
> Dan
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