1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
#!/usr/bin/env python
import argparse
import gudhi as gd
""" 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="AlphaComplex creation from " "points read in a OFF file.",
epilog="Example: "
"example/alpha_complex_diagram_persistence_from_off_file_example.py "
"-f ../data/points/tore3D_300.off"
"- Constructs a alpha complex with the "
"points from the given OFF file.",
)
parser.add_argument("-f", "--file", type=str, required=True)
parser.add_argument("-a", "--max_alpha_square", type=float, required=False)
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()
print("##############################################################")
print("AlphaComplex creation from points read in a OFF file")
points = gd.read_points_from_off_file(off_file = args.file)
alpha_complex = gd.AlphaComplex(points = points)
if args.max_alpha_square is not None:
print("with max_edge_length=", args.max_alpha_square)
simplex_tree = alpha_complex.create_simplex_tree(
max_alpha_square=args.max_alpha_square
)
else:
simplex_tree = alpha_complex.create_simplex_tree()
print("Number of simplices=", simplex_tree.num_simplices())
diag = simplex_tree.persistence()
print("betti_numbers()=", simplex_tree.betti_numbers())
if args.no_diagram == False:
import matplotlib.pyplot as plot
gd.plot_persistence_diagram(diag, band=args.band)
plot.show()
|
