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Full Execution Example

master
Pietro 4 years ago
parent 59de299053
commit c6a19ea86a
  1. 1
      .gitignore
  2. 54
      PyCTBN/PyCTBN/structure_graph/network_generator.py
  3. 2
      PyCTBN/PyCTBN/structure_graph/set_of_cims.py
  4. 15
      PyCTBN/PyCTBN/structure_graph/trajectory_generator.py
  5. 41
      example.py

1
.gitignore vendored

@ -13,3 +13,4 @@ test1.json
test2.json
test3.json
result0.png
example.json

@ -3,6 +3,8 @@ from .network_graph import NetworkGraph
from .conditional_intensity_matrix import ConditionalIntensityMatrix
from .set_of_cims import SetOfCims
import numpy as np
import os
import json
class NetworkGenerator(object):
"""Provides the methods to generate a network graph and the CIMs related to it
@ -94,20 +96,30 @@ class NetworkGenerator(object):
row /= (sum(row) - row[i])
row *= diag
row[i] = -1 * diag
cim[i] = row
cim[i] = np.around(row, 4)
return cim
def out_json(self, filename):
"""Create a file in current directory and write on it the generated network and the CIMs,
after having restructured the objects in order to respect the standard JSON file structure.
@property
def graph(self) -> NetworkGraph:
return self._graph
:param filename: Name of the output file (it must include json extension)
:type filename: string
"""
@property
def cims(self) -> NetworkGraph:
return self._cims
@property
def dyn_str(self) -> list:
return [{"From": edge[0], "To": edge[1]} for edge in self._graph.edges]
dyn_str = [{"From": edge[0], "To": edge[1]} for edge in self._graph.edges]
variables = [{"Name": l, "Value": self._vals[i]} for i, l in enumerate(self._labels)]
@property
def variables(self) -> list:
return [{"Name": l, "Value": self._vals[i]} for i, l in enumerate(self._labels)]
"""Restructure the CIMs object in order to fit the standard JSON file structure
"""
@property
def dyn_cims(self) -> dict:
dyn_cims = {}
for i, l in enumerate(self._labels):
@ -115,10 +127,13 @@ class NetworkGenerator(object):
parents = self._graph.get_ordered_by_indx_set_of_parents(l)[0]
for j, comb in enumerate(self._cims[l].p_combs):
comb_key = ""
if len(parents) != 0:
for k, val in enumerate(comb):
comb_key += parents[k] + "=" + str(val)
if k < len(comb) - 1:
comb_key += ","
else:
comb_key = l
cim = self._cims[l].filter_cims_with_mask(np.array([True for p in parents]), comb)
if len(parents) == 1:
@ -126,25 +141,8 @@ class NetworkGenerator(object):
elif len(parents) == 0:
cim = cim[0].cim
else:
cim = cim.cim
cim = cim[0].cim
dyn_cims[l][comb_key] = [dict([(str(i), val) for i, val in enumerate(row)]) for row in cim]
data = {
"dyn.str": dyn_str,
"variables": variables,
"dyn.cims": dyn_cims,
"samples": []
}
path = os.getcwd()
with open(path + "/" + filename, "w") as json_file:
json.dump(data, json_file)
@property
def graph(self) -> NetworkGraph:
return self._graph
@property
def cims(self) -> NetworkGraph:
return self._cims
return dyn_cims

@ -84,7 +84,7 @@ class SetOfCims(object):
return self._actual_cims
else:
flat_indxs = np.argwhere(np.all(self._p_combs[:, mask_arr] == comb, axis=1)).ravel()
return self._actual_cims[flat_indxs]
return np.array(self._actual_cims)[flat_indxs.astype(int)]
@property
def actual_cims(self) -> np.ndarray:

@ -24,7 +24,7 @@ class TrajectoryGenerator(object):
:type _generated_trajectory: pandas.DataFrame
"""
def __init__(self, importer: AbstractImporter):
def __init__(self, importer: AbstractImporter = None, variables: list = None, dyn_str: list = None, dyn_cims: dict = None):
"""Constructor Method
It parses and elaborates the data fetched from importer in order to make the objects structure
more suitable for the forthcoming trajectory generation
@ -32,14 +32,17 @@ class TrajectoryGenerator(object):
self._importer = importer
self._vnames = self._importer._df_variables.iloc[:, 0].to_list()
self._vnames = self._importer._df_variables.iloc[:, 0].to_list() if importer is not None else [v["Name"] for v in variables]
self._parents = {}
for v in self._vnames:
if importer is not None:
self._parents[v] = self._importer._df_structure.where(self._importer._df_structure["To"] == v).dropna()["From"].tolist()
else:
self._parents[v] = [edge["From"] for edge in dyn_str if edge["To"] == v]
self._cims = {}
sampled_cims = self._importer._raw_data[0]["dyn.cims"]
sampled_cims = self._importer._raw_data[0]["dyn.cims"] if importer is not None else dyn_cims
for v in sampled_cims.keys():
p_combs = []
v_cims = []
@ -48,8 +51,12 @@ class TrajectoryGenerator(object):
cim = pd.DataFrame(sampled_cims[v][comb]).to_numpy()
v_cims.append(ConditionalIntensityMatrix(cim = cim))
if importer is not None:
sof = SetOfCims(node_id = v, parents_states_number = [self._importer._df_variables.where(self._importer._df_variables["Name"] == p)["Value"] for p in self._parents[v]],
node_states_number = self._importer._df_variables.where(self._importer._df_variables["Name"] == v)["Value"], p_combs = p_combs, cims = v_cims)
node_states_number = self._importer._df_variables.where(self._importer._df_variables["Name"] == v)["Value"], p_combs = np.array(p_combs), cims = v_cims)
else:
sof = SetOfCims(node_id = v, parents_states_number = [[variable["Value"] for variable in variables if variable["Name"] == p][0] for p in self._parents[v]],
node_states_number = [variable for variable in variables if variable["Name"] == v][0]["Value"], p_combs = np.array(p_combs), cims = v_cims)
self._cims[v] = sof
def CTBN_Sample(self, t_end = -1, max_tr = -1):

@ -0,0 +1,41 @@
from PyCTBN.PyCTBN.structure_graph.trajectory_generator import TrajectoryGenerator
from PyCTBN.PyCTBN.structure_graph.network_generator import NetworkGenerator
from PyCTBN.PyCTBN.utility.json_importer import JsonImporter
from PyCTBN.PyCTBN.utility.json_exporter import JsonExporter
from PyCTBN.PyCTBN.structure_graph.structure import Structure
from PyCTBN.PyCTBN.structure_graph.sample_path import SamplePath
from PyCTBN.PyCTBN.estimators.structure_constraint_based_estimator import StructureConstraintBasedEstimator
# Network Generation
labels = ["X", "Y", "Z"]
card = 3
vals = [card for l in labels]
cim_min = 1
cim_max = 3
ng = NetworkGenerator(labels, vals)
ng.generate_graph(0.3)
ng.generate_cims(cim_min, cim_max)
# Trajectory Generation
print(ng.dyn_str)
e1 = JsonExporter(ng.variables, ng.dyn_str, ng.dyn_cims)
tg = TrajectoryGenerator(variables = ng.variables, dyn_str = ng.dyn_str, dyn_cims = ng.dyn_cims)
sigma = tg.CTBN_Sample(max_tr = 10)
e1.add_trajectory(tg.to_json())
e1.out_json("example.json")
# Network Estimation (Constraint Based)
importer = JsonImporter(file_path="example.json", samples_label='samples',
structure_label='dyn.str', variables_label='variables',
time_key='Time', variables_key='Name')
importer.import_data(0)
s1 = SamplePath(importer=importer)
s1.build_trajectories()
s1.build_structure()
se1 = StructureConstraintBasedEstimator(sample_path=s1, exp_test_alfa=0.1, chi_test_alfa=0.1,
known_edges=[], thumb_threshold=25)
edges = se1.estimate_structure(True)
se1.save_plot_estimated_structure_graph('./result.png')
print(se1.adjacency_matrix())
print(edges)