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#!/usr/bin/env python
import argparse
import matplotlib.pyplot as plot
import gudhi
""" This file is part of the Gudhi Library - https://gudhi.inria.fr/ - which is released under MIT.
See file LICENSE or go to https://gudhi.inria.fr/licensing/ for full license details.
Author(s): Vincent Rouvreau
Copyright (C) 2016 Inria
Modification(s):
- YYYY/MM Author: Description of the modification
"""
__author__ = "Vincent Rouvreau"
__copyright__ = "Copyright (C) 2016 Inria"
__license__ = "MIT"
parser = argparse.ArgumentParser(
description="TangentialComplex creation from " "points read in a OFF file.",
epilog="Example: "
"example/tangential_complex_plain_homology_from_off_file_example.py "
"-f ../data/points/tore3D_300.off -i 3"
"- Constructs a tangential complex with the "
"points from the given OFF file",
)
parser.add_argument("-f", "--file", type=str, required=True)
parser.add_argument("-i", "--intrisic_dim", type=int, required=True)
parser.add_argument("-b", "--band", type=float, default=0.0)
parser.add_argument(
"--no-diagram",
default=False,
action="store_true",
help="Flag for not to display the diagrams",
)
args = parser.parse_args()
with open(args.file, "r") as f:
first_line = f.readline()
if (first_line == "OFF\n") or (first_line == "nOFF\n"):
print("#####################################################################")
print("TangentialComplex creation from points read in a OFF file")
tc = gudhi.TangentialComplex(intrisic_dim=args.intrisic_dim, off_file=args.file)
tc.compute_tangential_complex()
st = tc.create_simplex_tree()
message = "Number of simplices=" + repr(st.num_simplices())
print(message)
diag = st.persistence(persistence_dim_max=True)
print("betti_numbers()=")
print(st.betti_numbers())
if args.no_diagram == False:
gudhi.plot_persistence_diagram(diag, band=args.band)
plot.show()
else:
print(args.file, "is not a valid OFF file")
f.close()
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