cspline routine

[BruceWilliams2010]

I am posting this in this forum under the possibly wrong(?) assumption that a lot of those that use this forum work with mathematical problems on a regular basis.

I am looking for a cspline routine that will produce the same values as the Graph XY function in Open Office. I have tried several macros that were posted here but they either lock up or fail badly. I have posted a notice in the paid services section http://forum.openoffice.org/en/forum/viewtopic.php?f=53&t=59927.
There you can also find an example spread sheet.

Thank you for your time

Bruce Williams

Closed - duplicate of http://forum.openoffice.org/en/forum/viewtopic.php?f=9&t=59961 but keeping it for people who watch the Math forum - floris v, moderator