Estimate of the reciprocal condition number of a matrix. Equivalent to R's rcond().
Uses LAPACK's estimators (dgecon on the LU decomposition, or dtrcon for triangular matrices). For a
non-square matrix, the estimate is computed on the triangular factor R of its QR decomposition
(of the transpose if the matrix is wide). Returns 0 for an exactly singular matrix.
Estimate of the reciprocal condition number of a matrix. Equivalent to R's
rcond().Uses LAPACK's estimators (
dgeconon the LU decomposition, ordtrconfor triangular matrices). For a non-square matrix, the estimate is computed on the triangular factorRof its QR decomposition (of the transpose if the matrix is wide). Returns 0 for an exactly singular matrix.