Function polyFitBetaBuf
Same as polyFitBeta, but allows the caller to provide an explicit buffer to return the coefficients in. If it's too short, a new one will be allocated. Otherwise, results will be returned in the user-provided buffer.
double[] polyFitBetaBuf(T, U)
(
double[] buf,
U Y,
T X,
uint N,
double ridge = 0
);