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Ian Ian is offline
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Default Charts/XY(scatter)/Smooth lines option

I would appreciate your help in the following issue:

We like to know what function the Excel developpers have used in Excel for
Charts/XY(scatter)/smooth lines. It iseems to us that it is a B-spline but
there are many of those around. Could you please provide us with the exact
spline function used for interpolation in this Excel option and possibly the
code

Thanks a lot in advance
Ian
 
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