Compute Spearman’s rank correlation coefficient rho.
For two data vectors x and y, Spearman’s rho is the correlation coefficient of the ranks of x and y.
If x and y are drawn from independent distributions, rho
has zero mean and variance 1 / (n - 1)
, and is asymptotically
normally distributed.
spearman (x)
is equivalent to
spearman (x, x)
.
See also: ranks, kendall.
Package: octave