rcondReturn the reciprocal condition number of a matrix |
This information is part of the Modelica Standard Library maintained by the Modelica Association.
r = Matrices.rcond(A);
This function estimates the reciprocal of the condition number (norm(A) * norm(inv(A))) of a general real matrix A, in either the 1-norm or the infinity-norm, using the LAPACK function DGECON. If rcond(A) is near 1.0, A is well conditioned and A is ill conditioned if rcond(A) is near zero.
A = [1, 2; 2, 1]; r = rcond(A); results in: r = 0.3333
A |
Type: Real[:,size(A, 1)] Description: Square real matrix |
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inf |
Default Value: false Type: Boolean Description: Is true if infinity norm is used and false for 1-norm |
rcond |
Type: Real Description: Reciprocal condition number of A |
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info |
Type: Integer Description: Information |