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#!/usr/bin/env python
import argparse
import matplotlib.pyplot as plot
import errno
import os
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"
def is_file_perseus(file):
num_lines = open(file).read().count("\n")
try:
f = open(file)
num_dim = int(f.readline())
coeff = 1
for dim in range(0, num_dim):
try:
line = int(f.readline())
coeff *= abs(line)
except ValueError:
return False
if num_lines == (1 + num_dim + coeff):
return True
else:
return False
except ValueError:
return False
parser = argparse.ArgumentParser(
description="Periodic cubical complex from a " "Perseus-style file name.",
epilog="Example: "
"./periodic_cubical_complex_barcode_persistence_from_perseus_file_example.py"
" -f ../data/bitmap/CubicalTwoSphere.txt",
)
parser.add_argument("-f", "--file", type=str, required=True)
parser.add_argument(
"--no-barcode",
default=False,
action="store_true",
help="Flag for not to display the barcodes",
)
args = parser.parse_args()
if is_file_perseus(args.file):
print("##################################################################")
print("PeriodicCubicalComplex creation")
periodic_cubical_complex = gudhi.PeriodicCubicalComplex(
perseus_file=args.file)
print("persistence(homology_coeff_field=3, min_persistence=0)=")
diag = periodic_cubical_complex.persistence(
homology_coeff_field=3, min_persistence=0
)
print(diag)
print("betti_numbers()=")
print(periodic_cubical_complex.betti_numbers())
if args.no_barcode == False:
gudhi.plot_persistence_barcode(diag)
plot.show()
else:
raise FileNotFoundError(errno.ENOENT, os.strerror(errno.ENOENT),
args.file)
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