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update NUTS acc rate list update #536

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Merged
merged 1 commit into from
Sep 30, 2024
Merged

update NUTS acc rate list update #536

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9 changes: 4 additions & 5 deletions cuqi/experimental/mcmc/_hmc.py
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Original file line number Diff line number Diff line change
Expand Up @@ -119,9 +119,6 @@ def __init__(self, target=None, initial_point=None, max_depth=15,

def _initialize(self):

# Arrays to store acceptance rate
self._acc = [None] # Overwrites acc from Sampler. TODO. Check if this is necessary

self._alpha = 0 # check if meaningful value
self._n_alpha = 0 # check if meaningful value

Expand Down Expand Up @@ -263,9 +260,9 @@ def step(self):
self.current_point = point_prime
self.current_target_logd = logd_prime
self.current_target_grad = np.copy(grad_prime)
self._acc.append(1)
acc = 1
else:
self._acc.append(0)
acc = 0

# update number of particles, tree level, and stopping criterion
n += n_prime
Expand All @@ -284,6 +281,8 @@ def step(self):
if np.isnan(self.current_target_logd):
raise NameError('NaN potential func')

return acc

def tune(self, skip_len, update_count):
""" adapt epsilon during burn-in using dual averaging"""
k = update_count+1
Expand Down
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