class Support(FeatureInterface):
def __init__(self):
self.supportIdentifier = SupportIdentifier()
def calculate(self, column, columnIndex, table):
support = self.supportIdentifier.getSupport(table)
return support[columnIndex]
class SupportConnectivityIdentifier(object):
def __init__(self):
self.logger = Logger().getLogger(__name__)
self.connectivityIdentifier = ConnectivityIdentifier()
self.supportIdentifier = SupportIdentifier()
def identifySubjectColumn(self, table, supportFloor=10, supportCeil=70, connectivityThreshold=0.01, alpha=0.5):
connectivities = self.connectivityIdentifier.getConnectivity(table, applyWeights=False)
supports = self.supportIdentifier.getSupport(table)
supports = [support if support < supportCeil and support > supportFloor else 0 for support in supports]
connectivities = [
connectivity if connectivity > connectivityThreshold else 0 for connectivity in connectivities
]
# Make supports and connectivities on the same scale
connectivities = [connectivity * 100 for connectivity in connectivities]
# supports = [support / 10 for support in supports]
consups = [0] * len(connectivities)
for columnIndex, item in enumerate(consups):
consups[columnIndex] = alpha * supports[columnIndex] + (1 - alpha) * connectivities[columnIndex]
return consups.index(max(consups))
