using csaps

[Sebastian Roller]

Hi at all,
my problem is, i dont know how to use csaps!!!
For what stands the parameters XI and W???
If i use the function, the error occurs:       


gcvspl: assertion failed: wx.rows() == n && wx.columns() == 1
error: called from `csaps' in file P:\octave\3.2.4_gcc-4.4.0\share\octave\packag
es\spline-gcvspl-1.0.8\csaps.m near line 71, column 14
error: called from:
error:   P:\octave\3.2.4_gcc-4.4.0\share\octave\3.2.4\m\miscellaneous\run.m at l
ine 53, column 7

Does anybody know how to use the function csaps and also the function gcvspl. and
provide an example to use it???

Thanks Sebastian