We have a class called “ScaleAutomism”?!?
Nice catch though.
Chris
On 3 Jan 2016, at 11:46 PM, Laurent BP <jumbo4444@yahoo.fr> wrote:
Hello,
In ScaleAutomatism::calculateExplicitIncrementAndScaleForLogarithmic
function [1], Y-axis automatic logarithmic scale is expand to B^0 (i.e. 1)
in almost all cases.
In step 2, it is said [2]
/* If minimum is less than 5 (i.e. original source values less than
B^5, B being the base of the scaling), or if minimum and maximum
are in different increment intervals (means, if minimum and maximum
are not both in the range [B^n,B^(n+1)] for a whole number n), set
minimum to 0, which results in B^0=1 on the axis. */
I do not agree with this comment because on a log scale, "1" has no special
meaning: it is not the origin, like "0" is on a linear scale. I would
propose a patch to suppress this part, but there are may be some good
reasons to expand to 1?
I opened bug 96871 [3] about this.
Thanks in advance for your help.
Best regards,
Laurent BP
[1]
http://opengrok.libreoffice.org/xref/core/chart2/source/view/axes/ScaleAutomatism.cxx#calculateExplicitIncrementAndScaleForLogarithmic
[2]
http://opengrok.libreoffice.org/xref/core/chart2/source/view/axes/ScaleAutomatism.cxx#362
[3] https://bugs.documentfoundation.org/show_bug.cgi?id=96871
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