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http://www.openoffice.org/issues/show_bug.cgi?id=77963
                 Issue #|77963
                 Summary|Overlapping Histograms
               Component|Chart
                 Version|OOo 2.2
                Platform|All
                     URL|http://rapid-i.com/images/stories/rapidi/yale/screensh
                        |ots/screenshot14.gif
              OS/Version|All
                  Status|UNCONFIRMED
       Status whiteboard|
                Keywords|
              Resolution|
              Issue type|FEATURE
                Priority|P3
            Subcomponent|viewing
             Assigned to|kla
             Reported by|discoleo





------- Additional comments from [EMAIL PROTECTED] Wed May 30 19:14:01 +0000 
2007 -------
One feature that I really miss are histograms (this is dealt in issue 49971, see
http://www.openoffice.org/issues/show_bug.cgi?id=49971).

An extension to the previous issue are overlapping histograms. These are
especially helpful when studying multiple groups of data. One application field
is in data mining. [Please note that data mining is extensively used by big
corporations.]

Overlapping histograms should allow *colour overlaying* to preserve visibility.
This is best viewed in the following example:
http://rapid-i.com/images/stories/rapidi/yale/screenshots/screenshot14.gif (see
also the other examples on the site for various data-mining techniques).

It would be surely useful to have the ability:
  - to plot multiple histograms (or other charts simultaneously) AND
  - have the ability to set various colour overlaying modes
     - add, XOR, ...
     - transparency, ...
     - IF ( overlap ) THEN slight shifting

For other types of simultaneous plots, see also:
http://addictedtor.free.fr/graphiques/RGraphGallery.php?graph=136 and various
other examples on http://addictedtor.free.fr/graphiques/ .

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