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http://www.openoffice.org/issues/show_bug.cgi?id=111487
                 Issue #|111487
                 Summary|Add support for constant B-spline (zero order hold)
               Component|Chart
                 Version|OOO320m12
                Platform|All
                     URL|
              OS/Version|All
                  Status|UNCONFIRMED
       Status whiteboard|
                Keywords|
              Resolution|
              Issue type|ENHANCEMENT
                Priority|P3
            Subcomponent|configuration
             Assigned to|kla
             Reported by|nmarci





------- Additional comments from nma...@openoffice.org Sun May  9 07:58:38 
+0000 2010 -------
When drawing an X-Y type diagram it is possible to configure the order of the
B-spline for smooth lines. Currently the minimum order of the B-spline is 1.

However, there are cases when the constant B-spline is wanted. This would be a
B-spline with order 0, see also
http://en.wikipedia.org/wiki/B-spline#Constant_B-spline . In other places this
is called zero order hold, see http://en.wikipedia.org/wiki/Zero_Order_Hold .

Imagine a data series where the first column contains a timestamp in seconds and
the second column contains the current state of a switch: 0 or 1. The data
series only contains the point where a change happened in the switch. In this
case the chart to be drawn should be a constant line starting at the first
timestamp value, then jump to the next constant value at the following 
timestamp.

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