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la.norms.rcond
Compute the reciprocal of the condition number of a matrix.
Syntax
la.norms.rcond(A, options?)
Description
Compute the reciprocal of the condition number of a matrix. The reciprocal condition number rcond = 1/κ(A) = 1/(||A|| * ||A^(-1)||) A small rcond (e.g., < machine_epsilon * n) indicates an ill-conditioned or nearly singular matrix. Uses LU factorization (DGETRF) followed by DGECON.
Parameters
| Name | Description |
|---|---|
| A | - Input square matrix (n × n) |
| options(optional) | - Computation options |
Returns
RcondResult