interpolate data points problem

hi all

why i get this error when interpolating data

 NaN found in Y, interpolation at undefined values
   will result in undefined values

and how i can solve this problem??

thank you

Answer 1

[George Papazafeiropoulos]

At least one entry in Y is NaN (Not-A-Number). To find it, type in the command window:

find(isnan(Y))

You should check the way Y is extracted.