This function computes the Kolmogorov-Smirnov statistics (KS).
KolmogorovSmirnov(S1, S2)
Vector containing the sample 1 from which CDF1 will be estimated.
Vector containing the sample 2 from which CDF2 will be estimated.
Returns the value of the Kolmogorov-Smirnov statistics.
CDF1 and CDF2 are estimated empirically to compute the Kolmogorov-Smirnov statistics.
D.A. Darling. "The Kolmogorov-Smirnov, Cramer-von Mises tests", Ann. Math. Statist., 28 (4), 823-838 (1957).
P.-A. Michelangeli, M. Vrac, H. Loukos. "Probabilistic downscaling approaches: Application to wind cumulative distribution functions", Geophys. Res. Lett., doi:10.1029/2009GL038401, 2009.