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"""!
@brief CCORE Wrapper for Fuzzy C-Means algorithm.
@authors Andrei Novikov (pyclustering@yandex.ru)
@date 2014-2020
@copyright BSD-3-Clause
"""
from ctypes import c_double, c_size_t, POINTER
from pyclustering.core.wrapper import ccore_library
from pyclustering.core.pyclustering_package import pyclustering_package, package_extractor, package_builder
class fcm_package_indexer:
INDEX_CLUSTERS = 0
INDEX_CENTERS = 1
INDEX_MEMBERSHIP = 2
def fcm_algorithm(sample, centers, m, tolerance, itermax):
pointer_data = package_builder(sample, c_double).create()
pointer_centers = package_builder(centers, c_double).create()
ccore = ccore_library.get()
ccore.fcm_algorithm.restype = POINTER(pyclustering_package)
package = ccore.fcm_algorithm(pointer_data, pointer_centers, c_double(m), c_double(tolerance), c_size_t(itermax))
result = package_extractor(package).extract()
ccore.free_pyclustering_package(package)
return result
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