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linalg[cond] - condition number of a matrix
Calling Sequence
cond(A)
cond(A, normname)
Parameters
A
-
square matrix
normname
(optional) matrix norm, must be one of: 1, 2, 'infinity', or 'frobenius'.
Description
Important: The linalg package has been deprecated. Use the superseding packages, LinearAlgebra and VectorCalculus, instead.
- For information on migrating linalg code to the new packages, see examples/LinearAlgebraMigration.
The function cond computes the ``standard'' matrix condition number, defined as norm(A) * norm(inverse(A)). The matrix norm is the default employed by the linalg[norm] function, namely the infinity norm (maximum row sum).
More generally, cond(A, normname) computes norm(A, normname) * norm(inverse(A), normname). This is the same measure, but using the specified norm instead of the infinity norm.
The command with(linalg,cond) allows the use of the abbreviated form of this command.
Examples
See Also
linalg(deprecated)[norm], LinearAlgebra, LinearAlgebra[ConditionNumber]
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