Issue 84589 - for logarithmic scale show values on minor grid
Summary: for logarithmic scale show values on minor grid
Alias: None
Product: General
Classification: Code
Component: chart (show other issues)
Version: 3.3.0 or older (OOo)
Hardware: All Windows XP
: P3 Trivial (vote)
Target Milestone: ---
Assignee: AOO issues mailing list
QA Contact:
Depends on:
Reported: 2007-12-15 00:26 UTC by Regina Henschel
Modified: 2013-09-25 20:41 UTC (History)
1 user (show)

See Also:
Issue Type: FEATURE
Latest Confirmation in: ---
Developer Difficulty: ---


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Description Regina Henschel 2007-12-15 00:26:36 UTC
Up to now the axis show no values for minor grids. In case of logarithmic
scaling this is not good. 
In the old chart the minor grid has ticks at:
For 2 intervals at 5
For 3 intervals at 3 1/3 and at 6 2/3
For 4 intervals at 2.5 and 5 and 7.5
That has been the same way as for example MuPad does it.

In the new chart the minor grid has ticks at:
For 2 intervals at 5.5
For 3 intervals at 4 and 7
For 4 intervals at 3.25 and 5.5 and 7.75
The new chart has a different grid than the old one.

I tried to find out whether there exists a standard for setting minor grids. It
seems that there is no standard, but the charts with logarithmic minor grid
which I found, write values to the minor grid, so that the user knows, where the
grid is.

Excel works around the problem by not such minor grids but always uses minor
grids with 9 intervals. Those have ticks at 2, 3, 4, 5, 6, 7, 8, 9 in both methods.

In OOo the user do not know where the grid is and it changes from old to new
chart, therefore I suggest to write values not only for the major grid but for
the minor grid too.
Comment 1 kla 2007-12-17 09:16:59 UTC
@BM: one for you.
Comment 2 bjoern.milcke 2007-12-17 13:18:35 UTC
Seems to be a valid request. The question remains: show numbers always for minor
grids (probably not, that's why there is the distinction), only in logarithmic,
or via a switch. The latter sounds most reasonable, but requires UI, API and
file format changes.
Comment 3 IngridvdM 2008-07-03 11:39:47 UTC
change owner