<< ishermitian

Linear algebra

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issymmetric

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Computes if matrix is symmetric.

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Syntax

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res = issymmetric(x)

res = issymmetric(x, 'skew')

res = issymmetric(x, 'nonskew')

res = issymmetric(x, tol)

Input argument

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x

a numeric value: scalar or matrix (double or single, integers, logical).

tol

a numeric value: finite and >= 0.

Output argument

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res

a logical.

Description

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issymmetric(x) computes if matrix is symmetric.

With 'nonskew' argument, x square matrix, x is symmetric if it is equal to its nonconjugate transpose, x = x.'

With 'skew' argument, x square matrix, x is symmetric if it is equal to its nonconjugate transpose, x = -x.'

Example

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issymmetric([1, 2; 2, 1])
issymmetric([1, 2.1; 2, 1.1], 0.2)
A = [0 1 -2 5; -1 0 3 -4; 2 -3 0 6; -5 4 -6 0];
issymmetric(A, 'skew')
issymmetric(A, 'nonskew')

See also

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ishermitian.

History

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Version	Description
1.0.0	initial version

Author

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Allan CORNET