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Add array_emd function #26

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Merged
merged 5 commits into from
Jan 22, 2018
Merged

Add array_emd function #26

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ef57b4f
Add array_emd function
scottgigante Jan 19, 2018
7df86c3
fix linting, add auto binsize
scottgigante Jan 19, 2018
6b8e950
add tests
scottgigante Jan 22, 2018
c3d7446
fix formatting errors
scottgigante Jan 22, 2018
da5675e
fix py27 float64 error
scottgigante Jan 22, 2018
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add tests
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@scottgigante
scottgigante committed Jan 22, 2018
commit 6b8e950b229abc2744a6892a80f58313231d3c41
60 changes: 59 additions & 1 deletion test/test_pyemd.py
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
import numpy as np
import pytest

from pyemd import emd, emd_with_flow
from pyemd import emd, emd_with_flow, emd_samples


EMD_PRECISION = 5
Expand Down Expand Up @@ -146,6 +146,64 @@ def test_extra_mass_penalty_flow():
[0.0, 0.0, 1.0, 0.0],
[0.0, 0.0, 1.0, 1.0]])


def test_case_samples():
first_array = [1,2,3,4]
second_array = [2,3,4,5]
emd_value = emd_samples(first_array, second_array)
assert round(emd_value, EMD_PRECISION) == 0.75


def test_case_samples_binsize():
first_array = [1,2,3,4]
second_array = [2,3,4,5]
emd_value = emd_samples(first_array, second_array, bins=2)
assert round(emd_value, EMD_PRECISION) == 0.5


def test_case_samples_manual_range():
first_array = [1,2,3,4]
second_array = [2,3,4,5]
emd_value = emd_samples(first_array, second_array, range=(0,10))
assert round(emd_value, EMD_PRECISION) == 1.0


def test_case_samples_not_normalized():
first_array = [1,2,3,4]
second_array = [2,3,4,5]
emd_value = emd_samples(first_array, second_array, normalized=False)
assert round(emd_value, EMD_PRECISION) == 3.0


def test_case_samples_custom_distance():
dist = lambda x : np.array([[0. if i == j else 1. for i in x] for j in x])
first_array = [1,2,3,4]
second_array = [2,3,4,5]
emd_value = emd_samples(first_array, second_array, distance=dist)
assert round(emd_value, EMD_PRECISION) == 0.25


def test_case_samples_2():
first_array = [1]
second_array = [2]
emd_value = emd_samples(first_array, second_array)
assert round(emd_value, EMD_PRECISION) == 0.5


def test_case_samples_3():
first_array = [1,1,1,2,3]
second_array = [1,2,2,2,3]
emd_value = emd_samples(first_array, second_array)
assert round(emd_value, EMD_PRECISION) == 0.32


def test_case_samples_4():
first_array = [1,2,3,4,5]
second_array = [99,98,97,96,95]
emd_value = emd_samples(first_array, second_array)
assert round(emd_value, EMD_PRECISION) == 78.4


# Validation testing
# ~~~~~~~~~~~~~~~~~~

Expand Down