Fix persistent_betti_numbers in Persistent_cohomology to make it work with cubical

Cython examples renaming and fixing



git-svn-id: svn+ssh://scm.gforge.inria.fr/svnroot/gudhi/branches/ST_cythonize@1439 636b058d-ea47-450e-bf9e-a15bfbe3eedb

Former-commit-id: ab84ba3acd6241257f1787e29ac2e3ac005bbd80

1 files changed, 63 insertions, 0 deletions

diff --git a/src/cython/example/alpha_complex_diagram_persistence_from_off_file_example.py b/src/cython/example/alpha_complex_diagram_persistence_from_off_file_example.py
new file mode 100755
index 00000000..8e534061
--- /dev/null
+++ b/src/cython/example/alpha_complex_diagram_persistence_from_off_file_example.py
@@ -0,0 +1,63 @@
+#!/usr/bin/env python
+
+import gudhi
+import argparse
+
+"""This file is part of the Gudhi Library. The Gudhi library
+   (Geometric Understanding in Higher Dimensions) is a generic C++
+   library for computational topology.
+
+   Author(s):       Vincent Rouvreau
+
+   Copyright (C) 2016 INRIA
+
+   This program 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.
+
+   This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+
+__author__ = "Vincent Rouvreau"
+__copyright__ = "Copyright (C) 2016 INRIA"
+__license__ = "GPL v3"
+
+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 '
+                                 '../data/points/tore3D_1307.off '
+                                 '- Constructs a alpha complex with the '
+                                 'points from the given file. File format '
+                                 'is X1, X2, ..., Xn')
+parser.add_argument("-f", "--file", type=str, required=True)
+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("AlphaComplex creation from points read in a OFF file")
+        alpha_complex = gudhi.AlphaComplex(off_file=args.file, max_alpha_square=0.5)
+    
+        diag = alpha_complex.persistence(homology_coeff_field=2, min_persistence=0.1)
+    
+        print("betti_numbers()=")
+        print(alpha_complex.betti_numbers())
+    
+        if args.no_diagram == False:
+            gudhi.diagram_persistence(diag)
+    else:
+        print(args.file, "is not a valid OFF file")
+
+    f.close()