# skfolio.utils.stats.corr_to_cov ### skfolio.utils.stats.corr_to_cov(corr, std) Convert a correlation matrix to a covariance matrix given its standard-deviation vector. * **Parameters:** **corr** *ndarray of shape (n, n)* : Correlation matrix. **std** *ndarray of shape (n, )* : Standard-deviation vector. * **Returns:** **cov** *ndarray of shape (n, n)* : Covariance matrix