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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | COND COND Condition Number of a Matrix
Usage
Calculates the condition number of a matrix. To compute the
2-norm condition number of a matrix (ratio of largest to smallest
singular values), use the syntax
y = cond(A)
where A is a matrix. If you want to compute the condition number
in a different norm (e.g., the 1-norm), use the second syntax
y = cond(A,p)
where p is the norm to use when computing the condition number.
The following choices of p are supported
- p = 1 returns the 1-norm, or the max column sum of A
- p = 2 returns the 2-norm (largest singular value of A)
- p = inf returns the infinity norm, or the max row sum of A
- p = 'fro' returns the Frobenius-norm (vector Euclidean norm, or RMS value)
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