'''
This file is part of PM4Py (More Info: https://pm4py.fit.fraunhofer.de).
PM4Py is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
PM4Py is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PM4Py. If not, see <https://www.gnu.org/licenses/>.
'''
from pm4py.objects.ocel.obj import OCEL
from typing import Optional, Dict, Any
from pm4py.algo.transformation.ocel.graphs import object_interaction_graph
[docs]def apply(ocel: OCEL, parameters: Optional[Dict[Any, Any]] = None):
"""
Adds for each object the centrality degree as feature
Parameters
-----------------
ocel
OCEL
parameters
Parameters of the algorithm
Returns
-----------------
data
Values of the added features
feature_names
Names of the added features
"""
if parameters is None:
parameters = {}
import networkx as nx
ordered_objects = list(ocel.objects[ocel.object_id_column])
g0 = object_interaction_graph.apply(ocel, parameters=parameters)
g = nx.Graph()
for edge in g0:
g.add_edge(edge[0], edge[1])
centrality = nx.degree_centrality(g)
data = []
feature_names = ["@@object_degree_centrality"]
for obj in ordered_objects:
if obj in centrality:
data.append([centrality[obj]])
else:
data.append([0])
return data, feature_names