scipy.linalg.lapack.ctrcon

scipy.linalg.lapack.ctrcon(a, norm='1', uplo='U', diag='N') = <flapack function ctrcon>

Estimate the reciprocal condition number of a triangular matrix (LAPACK ctrcon).

Parameters:

andarray

Square triangular matrix; only the triangle named by uplo is read.

normstr, optional

'1' or 'O' for the 1-norm, 'I' for the infinity norm. Default is '1'.

uplostr, optional

'U' if a is upper triangular, 'L' if lower. Default is 'U'.

diagstr, optional

'U' if the matrix has a unit diagonal, 'N' otherwise. Default is 'N'.

Returns:

rcondfloat

Estimate of the reciprocal condition number.

infoint

0 on success; if negative, the -info-th argument had an illegal value.