Optionaloptions: CovOptionsCovariance of two vectors, or covariance matrix of the columns of a matrix (or between the columns of x and y).
Equivalent to R's cov().
Optionaly: readonly (readonly number[])[] | SampleOptionaloptions: CovOptions
Covariance of two vectors, or covariance matrix of the columns of a matrix (or between the columns of
xandy). Equivalent to R'scov().