From 3a9105e0d3bea5cc64610b7c0c3fb15f0e00bb9d Mon Sep 17 00:00:00 2001 From: Marc Glisse Date: Mon, 20 Apr 2020 11:37:44 +0200 Subject: Reintroduce _proj_on_diag, with a unit test --- src/python/gudhi/wasserstein/wasserstein.py | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'src/python/gudhi/wasserstein') diff --git a/src/python/gudhi/wasserstein/wasserstein.py b/src/python/gudhi/wasserstein/wasserstein.py index 5df66cf9..efc851a0 100644 --- a/src/python/gudhi/wasserstein/wasserstein.py +++ b/src/python/gudhi/wasserstein/wasserstein.py @@ -15,6 +15,17 @@ try: except ImportError: print("POT (Python Optimal Transport) package is not installed. Try to run $ conda install -c conda-forge pot ; or $ pip install POT") + +# Currently unused, but Théo says it is likely to be used again. +def _proj_on_diag(X): + ''' + :param X: (n x 2) array encoding the points of a persistent diagram. + :returns: (n x 2) array encoding the (respective orthogonal) projections of the points onto the diagonal + ''' + Z = (X[:,0] + X[:,1]) / 2. + return np.array([Z , Z]).T + + def _dist_to_diag(X, internal_p): ''' :param X: (n x 2) array encoding the points of a persistent diagram. -- cgit v1.2.3