clarification:

applied to chosen intervals only additionally

plus ... as an option

Hi Falko,
1 4 you.

Re-assigned to Matthias Müller-Prove for further evaluation.

to Bettina, our central dispatcher for RFEs

Reassigned to Björn.

->IHA: Sending you these issues so that all unconfirmed enhancements and
features are at one place.

->Lars, could you provide me with real life examples where this feature is
needed. Thanks in advance.

set target

I haven't got good examples at hand at the moment, sorry.

It is still not clear to me what this feature should be good for, so I will
close this issue now as wontfix.

closed

I know now what's this issue for:

If a data range contains more than one type of function one might like to 
apply a spline curve to the first 10 data points for example and then another 
different spline curve to the last 10 data points, but all in one chart as one 
continuous curve.

I therefore reopen.

I still don't see the use case. The provided case sounds very theoretically. The
effort to implement this cannot be justified.

The problem is, that splines as used in OOo (old and new way) are build in such
a way that the second-order derivative is continuous. I don't know Excels way,
but from seen curve I would say they have at least first-order derivative
continuous. Therefore you cannot use splines to smooth a curve with corners. Up
to now you have to define different data series from corner to corner. In
physics you will have such corners for example in a graph of a hysteresis.

close the invalid issue