forum.alglib.net

Hey guys,

I have an array of x-values and an array of y-values. I want to know the deviation of the point (-1), is there a chance to find out this point with the alglib ? Or is there the opportunity to get the deviation (function) to set the value ?

I tried it with the spline1dgriddiff2cubic-function, but there were wrong values in the first deviation.

Thanks a lot
Gabriel