d3443536f3d4e39d5e0b8f90e1f9d0e25af77713,pymc/step_methods/metropolis.py,BinaryMetropolis,astep,#BinaryMetropolis#Any#Any#,159

Before Change

        // Stochastically set value according to relative
        // probabilities of True and False
        return (random(len(q0)) < p_true / (p_true + p_false)).astype(int)

After Change

        docstring for astep
        // import pdb; pdb.set_trace()
        // Convert adaptive_scale_factor to a jump probability
        p_jump = 1.-.5**self.scaling

        rand_array = random(q0.shape)
        q = copy(q0)
        // Locations where switches occur, according to p_jump
        switch_locs = where(rand_array<p_jump)
        q[switch_locs] = True - q[switch_locs]

        q_new = metrop_select(logp(q) - logp(q0), q, q0)

        return q_new

Instances