issymmetric

Computes if matrix is symmetric.

📝 Syntax

• res = issymmetric(x)

• res = issymmetric(x, 'skew')

• res = issymmetric(x, 'nonskew')

• res = issymmetric(x, tol)

📥 Input argument

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

• tol - a numeric value: finite and >= 0.

📤 Output argument

• res - a logical.

📄 Description

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

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

ishermitian.

🕔 History

Version	📄 Description
1.0.0	initial version