cupy.linalg.cond#

cupy.linalg.cond(x, p=None)[source]#

Returns the condition number of a matrix.

This function computes the condition number using one of several norms, depending on the value of p.

Parameters:

  • x (cupy.ndarray) – The matrix whose condition number is computed.

  • p (str, int, optional) –

    The norm type used. The following norms are supported:

    • None: 2-norm

    • ’fro’: Frobenius norm.

    • inf: max(sum(abs(x), axis=1)).

    • -inf: min(sum(abs(x), axis=1)).

    • 1: max(sum(abs(x), axis=0)).

    • -1: min(sum(abs(x), axis=0)).

    • 2: 2-norm (largest singular value).

    • -2: smallest singular value.

Returns:

The condition number of the matrix. May be infinite.

Return type:

cupy.ndarray