sigpy.alg.PowerMethod

class sigpy.alg.PowerMethod(A, x, norm_func=None, max_iter=30)

Power method to estimate maximum eigenvalue and eigenvector.

Parameters:

• A (Linop or function) – Function to a hermitian linear mapping.
• x (array) – Variable to optimize over.
• max_iter (int) – Maximum number of iterations.

max_eig

Maximum eigenvalue of A.

Type:float

__init__(A, x, norm_func=None, max_iter=30)

Initialize self. See help(type(self)) for accurate signature.

Methods

__init__(A, x[, norm_func, max_iter])	Initialize self.
done()	Return whether the algorithm is done.
update()	Perform one update step.