sigpy.prox.L2Reg

class sigpy.prox.L2Reg(shape, lamda, y=None, proxh=None)

Proximal operator for l2 regularization.

\[\min_x \frac{1}{2} \|x - y\|_2^2 + \frac{\lambda}{2}\|x-z\|_2^2 + h(x)\]

Parameters:

• shape (tuple of ints) – Input shape.
• lamda (float) – Regularization parameter.
• y (scalar or array) – Bias term.
• proxh (Prox) – optional additional proximal operator.

__init__(shape, lamda, y=None, proxh=None)

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

Methods

__init__(shape, lamda[, y, proxh])

Initialize self.