RCOND

Purpose:

Estimates the reciprocal condition number of a square matrix.

Syntax:

RCOND(a)

a

-

A square matrix.

Returns:

A real, the estimated reciprocal condition number.

Example:

W1: {{1, 2, 3},

     {4, 5, 6}, 

     {7, 8, 9}} 

 

W2: {{1, 2, 3},

     {4, 5, 6}, 

     {7, 8, 0}} 

 

rcond(W1) == 1.54198E-018

rcond(W2) == 0.0193548

Remarks:

If the input array is well conditioned, the reciprocal condition number is near 1. If the input is ill conditioned, the reciprocal condition number is near 0.

 

RCOND requires a square matrix. See COND to estimate the condition number of a non-square matrix.

See Also:

COND

NORM

RANK

SVD