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Update fuzzy_art.py #1

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9 changes: 8 additions & 1 deletion src/fuzzy_art.py
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ def __init__(self, pattern_size: int, vigilance: float, choice: float, learn_rat
self.learn_rate = learn_rate
self.categories = []
self.category_counts = []
self.category_committed = []

def train(self, pattern: np.array):
# check that pattern is the correct length
Expand Down Expand Up @@ -52,11 +53,17 @@ def choose_category(self, pattern: np.array):
# add a new one
self.categories.append(np.ones(self.pattern_size))
self.category_counts.append(0)
self.category_committed.append(False)
return N

def learn_pattern(self, J: int, pattern: np.array):
category = self.categories[J]
category = self.learn_rate * np.minimum(pattern, category) + (1 - self.learn_rate) * category
# Fast commit slow recode eq.8 in paper https://doi.org/10.1016/0893-6080(91)90056-B
if self.category_committed[J]:
category = self.learn_rate * np.minimum(pattern, category) + (1 - self.learn_rate) * category
else:
category = np.minimum(pattern, category)
self.category_committed[J] = True
self.categories[J] = category
self.category_counts[J] += 1

Expand Down