def test_cluster_map_centroid_add_cluster():
clusters = ClusterMapCentroid()
centroids = []
for i in range(3):
cluster = ClusterCentroid(centroid=np.zeros_like(features))
centroids.append(np.zeros_like(features))
for id_data in range(2 * i):
centroids[-1] = ((centroids[-1] * id_data +
(id_data + 1) * features) / (id_data + 1))
cluster.assign(id_data, (id_data + 1) * features)
cluster.update()
clusters.add_cluster(cluster)
assert_array_equal(cluster.centroid, centroids[-1])
assert_equal(type(cluster), ClusterCentroid)
assert_equal(cluster, clusters[-1])
assert_equal(type(clusters.centroids), list)
assert_array_equal(list(itertools.chain(*clusters.centroids)),
list(itertools.chain(*centroids)))
# Check adding features of different sizes (shorter and longer)
features_shape_short = (1, features_shape[1] - 3)
features_too_short = np.ones(features_shape_short, dtype=dtype)
assert_raises(ValueError, cluster.assign, 123, features_too_short)
features_shape_long = (1, features_shape[1] + 3)
features_too_long = np.ones(features_shape_long, dtype=dtype)
assert_raises(ValueError, cluster.assign, 123, features_too_long)
def test_cluster_map_centroid_add_cluster():
clusters = ClusterMapCentroid()
centroids = []
for i in range(3):
cluster = ClusterCentroid(centroid=np.zeros_like(features))
centroids.append(np.zeros_like(features))
for id_data in range(2*i):
centroids[-1] = (centroids[-1]*id_data + (id_data+1)*features) / (id_data+1)
cluster.assign(id_data, (id_data+1)*features)
cluster.update()
clusters.add_cluster(cluster)
assert_array_equal(cluster.centroid, centroids[-1])
assert_equal(type(cluster), ClusterCentroid)
assert_equal(cluster, clusters[-1])
assert_equal(type(clusters.centroids), list)
assert_array_equal(list(itertools.chain(*clusters.centroids)), list(itertools.chain(*centroids)))
# Check adding features of different sizes (shorter and longer)
features_shape_short = (1, features_shape[1]-3)
features_too_short = np.ones(features_shape_short, dtype=dtype)
assert_raises(ValueError, cluster.assign, 123, features_too_short)
features_shape_long = (1, features_shape[1]+3)
features_too_long = np.ones(features_shape_long, dtype=dtype)
assert_raises(ValueError, cluster.assign, 123, features_too_long)
def test_cluster_centroid_assign():
centroid = np.zeros(features_shape)
cluster = ClusterCentroid(centroid)
indices = []
centroid = np.zeros(features_shape, dtype=dtype)
for idx in range(1, 10):
cluster.assign(idx, (idx + 1) * features)
cluster.update()
indices.append(idx)
centroid = (centroid * (idx - 1) + (idx + 1) * features) / idx
assert_equal(len(cluster), idx)
assert_equal(type(cluster.indices), list)
assert_array_equal(cluster.indices, indices)
assert_equal(type(cluster.centroid), np.ndarray)
assert_array_equal(cluster.centroid, centroid)
def test_cluster_centroid_assign():
centroid = np.zeros(features_shape)
cluster = ClusterCentroid(centroid)
indices = []
centroid = np.zeros(features_shape, dtype=dtype)
for idx in range(1, 10):
cluster.assign(idx, (idx+1) * features)
cluster.update()
indices.append(idx)
centroid = (centroid * (idx-1) + (idx+1) * features) / idx
assert_equal(len(cluster), idx)
assert_equal(type(cluster.indices), list)
assert_array_equal(cluster.indices, indices)
assert_equal(type(cluster.centroid), np.ndarray)
assert_array_equal(cluster.centroid, centroid)
def test_cluster_map_centroid_comparison_with_int():
clusters1_indices = range(10)
clusters2_indices = range(10, 15)
clusters3_indices = [15]
# Build a test ClusterMapCentroid
centroid = np.zeros_like(features)
cluster1 = ClusterCentroid(centroid.copy())
for i in clusters1_indices:
cluster1.assign(i, features)
cluster2 = ClusterCentroid(centroid.copy())
for i in clusters2_indices:
cluster2.assign(i, features)
cluster3 = ClusterCentroid(centroid.copy())
for i in clusters3_indices:
cluster3.assign(i, features)
# Update centroids
cluster1.update()
cluster2.update()
cluster3.update()
clusters = ClusterMapCentroid()
clusters.add_cluster(cluster1)
clusters.add_cluster(cluster2)
clusters.add_cluster(cluster3)
subset = clusters < 5
assert_equal(subset.sum(), 1)
assert_array_equal(list(clusters[subset][0]), clusters3_indices)
subset = clusters <= 5
assert_equal(subset.sum(), 2)
assert_array_equal(list(clusters[subset][0]), clusters2_indices)
assert_array_equal(list(clusters[subset][1]), clusters3_indices)
subset = clusters == 5
assert_equal(subset.sum(), 1)
assert_array_equal(list(clusters[subset][0]), clusters2_indices)
subset = clusters != 5
assert_equal(subset.sum(), 2)
assert_array_equal(list(clusters[subset][0]), clusters1_indices)
assert_array_equal(list(clusters[subset][1]), clusters3_indices)
subset = clusters > 5
assert_equal(subset.sum(), 1)
assert_array_equal(list(clusters[subset][0]), clusters1_indices)
subset = clusters >= 5
assert_equal(subset.sum(), 2)
assert_array_equal(list(clusters[subset][0]), clusters1_indices)
assert_array_equal(list(clusters[subset][1]), clusters2_indices)
def test_cluster_map_centroid_comparison_with_int():
clusters1_indices = range(10)
clusters2_indices = range(10, 15)
clusters3_indices = [15]
# Build a test ClusterMapCentroid
centroid = np.zeros_like(features)
cluster1 = ClusterCentroid(centroid.copy())
for i in clusters1_indices:
cluster1.assign(i, features)
cluster2 = ClusterCentroid(centroid.copy())
for i in clusters2_indices:
cluster2.assign(i, features)
cluster3 = ClusterCentroid(centroid.copy())
for i in clusters3_indices:
cluster3.assign(i, features)
# Update centroids
cluster1.update()
cluster2.update()
cluster3.update()
clusters = ClusterMapCentroid()
clusters.add_cluster(cluster1)
clusters.add_cluster(cluster2)
clusters.add_cluster(cluster3)
subset = clusters < 5
assert_equal(subset.sum(), 1)
assert_array_equal(list(clusters[subset][0]), clusters3_indices)
subset = clusters <= 5
assert_equal(subset.sum(), 2)
assert_array_equal(list(clusters[subset][0]), clusters2_indices)
assert_array_equal(list(clusters[subset][1]), clusters3_indices)
subset = clusters == 5
assert_equal(subset.sum(), 1)
assert_array_equal(list(clusters[subset][0]), clusters2_indices)
subset = clusters != 5
assert_equal(subset.sum(), 2)
assert_array_equal(list(clusters[subset][0]), clusters1_indices)
assert_array_equal(list(clusters[subset][1]), clusters3_indices)
subset = clusters > 5
assert_equal(subset.sum(), 1)
assert_array_equal(list(clusters[subset][0]), clusters1_indices)
subset = clusters >= 5
assert_equal(subset.sum(), 2)
assert_array_equal(list(clusters[subset][0]), clusters1_indices)
assert_array_equal(list(clusters[subset][1]), clusters2_indices)
