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linalg[cond] - condition number of a matrix
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Calling Sequence
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cond(A)
cond(A, normname)
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Parameters
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A
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square matrix
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normname
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(optional) matrix norm, must be one of: 1, 2, 'infinity', or 'frobenius'.
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Description
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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).
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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.
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The command with(linalg,cond) allows the use of the abbreviated form of this command.
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