@cond |

Condition number of matrix.

Syntax: @cond(m[, n])

m: matrix, sym

n: (optional) integer

Return: number

Returns the condition number of a square matrix or sym, m.

The condition number is the product of the norm of the matrix divided by the norm of the inverse.

If the norm option n is omitted, the infinity norm is used to determine the condition number. Possible norms are “-1” for the infinity norm, “0” for the Frobenius norm, and an integer “n” for the norm.

Examples

matrix m1 = @mnrnd(10, 10)

scalar sc1 = @cond(m1)

computes the infinity norm of the matrix M1.

sym s1 = @inner(m1)

scalar sc2 = @cond(s1, 2)

computes the norm of the symmetric matrix S1.

Cross-references

See also
@norm