20.24 chart:interpolation

["Andreas J. Guelzow" <andreas.guelzow@concordia.ab.ca>]

I had written the cubic spline proposal to closely match what OOo
appears to be doing. I may have misread the code on one minor issue and
was told that the intention of OOo is different. Since that intention is
much simpler to states, I have changed the attached proposed solution.

Andreas

spline-interpolation.odt

This is a digitally signed message part