Distance Functions (Euclidean+ Notebook) by antmarakis · Pull Request #460 · aimacode/aima-python · GitHub
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Distance Functions (Euclidean+ Notebook) #460

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Merged
norvig merged 6 commits into from
Apr 6, 2017
Merged

Distance Functions (Euclidean+ Notebook) #460

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bbd6eba
Update learning.py
antmarakis Mar 31, 2017
31de380
Add Euclidean Distance
antmarakis Mar 31, 2017
6cace08
Update learning.ipynb
antmarakis Mar 31, 2017
03b5966
minor fix in notebook
antmarakis Mar 31, 2017
2422242
minor spacing in learning.py
antmarakis Mar 31, 2017
8b4239a
Added Euclidean Test
antmarakis Apr 1, 2017
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239 changes: 238 additions & 1 deletion learning.ipynb
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28 changes: 16 additions & 12 deletions learning.py
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Original file line number Diff line number Diff line change
Expand Up @@ -17,28 +17,32 @@
# ______________________________________________________________________________


def rms_error(predictions, targets):
return math.sqrt(ms_error(predictions, targets))
def euclidean_distance(X, Y):
return math.sqrt(sum([(x - y)**2 for x, y in zip(X, Y)]))


def ms_error(predictions, targets):
return mean([(p - t)**2 for p, t in zip(predictions, targets)])
def rms_error(X, Y):
return math.sqrt(ms_error(X, Y))


def mean_error(predictions, targets):
return mean([abs(p - t) for p, t in zip(predictions, targets)])
def ms_error(X, Y):
return mean([(x - y)**2 for x, y in zip(X, Y)])


def manhattan_distance(predictions, targets):
return sum([abs(p - t) for p, t in zip(predictions, targets)])
def mean_error(X, Y):
return mean([abs(x - y) for x, y in zip(X, Y)])


def mean_boolean_error(predictions, targets):
return mean(int(p != t) for p, t in zip(predictions, targets))
def manhattan_distance(X, Y):
return sum([abs(x - y) for x, y in zip(X, Y)])


def hamming_distance(predictions, targets):
return sum(p != t for p, t in zip(predictions, targets))
def mean_boolean_error(X, Y):
return mean(int(x != y) for x, y in zip(X, Y))


def hamming_distance(X, Y):
return sum(x != y for x, y in zip(X, Y))

# ______________________________________________________________________________

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39 changes: 36 additions & 3 deletions tests/test_learning.py
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