def calculate_elbow(path_to_data, path_to_answer, kmin, kmax, ccore, **kwargs):
repeat = 10 # Elbow method randomly chooses initial centers therefore we need to repeat test if it fails.
testing_result = False
initializer = kwargs.get('initializer', kmeans_plusplus_initializer)
sample = read_sample(path_to_data)
answer = answer_reader(path_to_answer)
additional_info = []
for _ in range(repeat):
elbow_instance = elbow(sample, kmin, kmax, ccore=ccore, initializer=initializer)
elbow_instance.process()
actual_elbow = elbow_instance.get_amount()
actual_wce = elbow_instance.get_wce()
assertion.gt(actual_elbow, kmin)
assertion.lt(actual_elbow, kmax)
assertion.eq(len(actual_wce), kmax - kmin)
assertion.lt(actual_wce[-1], actual_wce[0] + 0.0000001)
if actual_elbow != len(answer.get_clusters()):
additional_info.append(actual_elbow)
#time.sleep(0.05) # sleep to gain new seed for random generator
continue
testing_result = True
break
message = str(len(answer.get_clusters())) + ": " + str(additional_info)
assertion.true(testing_result, message=message)
def calculate_elbow(path_to_data, path_to_answer, kmin, kmax, ccore, **kwargs):
repeat = 10 # Elbow method randomly chooses initial centers therefore we need to repeat test if it fails.
testing_result = False
initializer = kwargs.get('initializer', kmeans_plusplus_initializer)
sample = read_sample(path_to_data)
answer = answer_reader(path_to_answer)
additional_info = []
for _ in range(repeat):
elbow_instance = elbow(sample, kmin, kmax, ccore=ccore, initializer=initializer)
elbow_instance.process()
actual_elbow = elbow_instance.get_amount()
actual_wce = elbow_instance.get_wce()
assertion.gt(actual_elbow, kmin)
assertion.lt(actual_elbow, kmax)
assertion.eq(len(actual_wce), kmax - kmin)
assertion.lt(actual_wce[-1], actual_wce[0] + 0.0000001)
if actual_elbow != len(answer.get_clusters()):
additional_info.append(actual_elbow)
#time.sleep(0.05) # sleep to gain new seed for random generator
continue
testing_result = True
break
message = str(len(answer.get_clusters())) + ": " + str(additional_info)
assertion.true(testing_result, message=message)
def calculate_elbow(path_to_data, path_to_answer, kmin, kmax, ccore, **kwargs):
repeat = 5 # Elbow method randomly chooses initial centers therefore we need to repeat test if it fails.
testing_result = False
initializer = kwargs.get('initializer', kmeans_plusplus_initializer)
sample = read_sample(path_to_data)
answer = answer_reader(path_to_answer)
for _ in range(repeat):
elbow_instance = elbow(sample, kmin, kmax, ccore=ccore, initializer=initializer)
elbow_instance.process()
actual_elbow = elbow_instance.get_amount()
actual_wce = elbow_instance.get_wce()
assertion.gt(actual_elbow, kmin)
assertion.lt(actual_elbow, kmax)
assertion.eq(len(actual_wce), kmax - kmin)
assertion.lt(actual_wce[-1], actual_wce[0])
if actual_elbow != len(answer.get_clusters()):
continue
testing_result = True
break
assertion.true(testing_result)
def calculate_elbow(path_to_data, path_to_answer, kmin, kmax, ccore,
**kwargs):
repeat = 15 # Elbow method randomly chooses initial centers therefore we need to repeat test if it fails.
testing_result = False
kstep = kwargs.get('kstep', 1)
sample = read_sample(path_to_data)
expected_clusters_amount = None
if path_to_answer is not None:
if isinstance(path_to_answer, int):
expected_clusters_amount = path_to_answer
else:
expected_clusters_amount = len(
answer_reader(path_to_answer).get_clusters())
additional_info = []
for _ in range(repeat):
elbow_instance = elbow(sample, kmin, kmax, ccore=ccore, **kwargs)
elbow_instance.process()
actual_elbow = elbow_instance.get_amount()
actual_wce = elbow_instance.get_wce()
assertion.gt(actual_elbow, kmin)
assertion.lt(actual_elbow, kmax)
assertion.eq(len(actual_wce),
math.floor((kmax - kmin) / kstep + 1))
assertion.lt(actual_wce[-1], actual_wce[0] + 0.0000001)
if (expected_clusters_amount is not None) and (
actual_elbow != expected_clusters_amount):
additional_info.append(actual_elbow)
continue
testing_result = True
break
message = None
if expected_clusters_amount is not None:
message = str(expected_clusters_amount) + ": " + str(
additional_info)
assertion.true(testing_result, message=message)