POT

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July 2021

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Question about ot. gromov_wasserstein function
by Azim Dehghani Amirabad July 15, 2021

July 15, 2021

Hi, I'm using OT package for GW, and I have a question regarding two arguments of the ot.gromov.gromov_wasserstein function. What is p and q? I couldn't see them in the objective function of the GW. p = ot.unif(n_samples)q = ot.unif(n_samples) gw0, log0 = ot.gromov.gromov_wasserstein( C1, C2, p, q, 'square_loss', verbose=True, log=True) gw, log = ot.gromov.entropic_gromov_wasserstein( C1, C2, p, q, 'square_loss', epsilon=5e-4, log=True, verbose=True) print('Gromov-Wasserstein distances: ' + str(log0['gw_dist']))print('Entropic Gromov-Wasserstein distances: ' + str(log['gw_dist']))

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POT 0.7.0 Released
by Rémi Flamary July 6, 2021

July 6, 2021

It is with great pleasure that in announce on the list the release of POT 0.7.0 (available also on PyPI and conda-forge). This is the new stable release for POT. We made a lot of changes in the documentation and added several new features such as Partial OT, Unbalanced and Multi Sources OT Domain Adaptation and several bug fixes. One important change is that we have created the GitHub organization PythonOT that now owns the main POT repository https://github.com/PythonOT/POT and the repository for the new documentation is now hosted at https://PythonOT.github.io/. This is the first release where the Python 2.7 tests have been removed. Most of the toolbox should still work but we do not offer support for Python 2.7 and will close related Issues. A lot of changes have been done to the documentation that is now hosted on https://PythonOT.github.io/ instead of readthedocs. It was a hard choice but readthedocs did not allow us to run sphinx-gallery to update our beautiful examples and it was a huge amount of work to maintain. The documentation is now automatically compiled and updated on merge. We also removed the notebooks from the repository for space reason and also because they are all available in the example gallery. Note that now the output of the documentation build for each commit in the PR is available to check that the doc builds correctly before merging which was not possible with readthedocs. The CI framework has also been changed with a move from Travis to Github Action which allows to get faster tests on Windows, MacOS and Linux. We also now report our coverage on Codecov.io and we have a reasonable 92% coverage. We also now generate wheels for a number of OS and Python versions at each merge in the master branch. They are available as outputs of this action. This will allow simpler multi-platform releases from now on. In terms of new features we now have OTDA Classes for unbalanced OT, a new Domain adaptation class form multi domain problems (JCPOT), and several solvers to solve the Partial Optimal Transport problems. This release is also the moment to thank all the POT contributors (old and new) for helping making POT such a nice toolbox. A lot of changes (also in the API) are comming for the next versions. New Features - New documentation on https://PythonOT.github.io/ (PR #160, PR #143, PR #144) - Documentation build on CircleCI with sphinx-gallery (PR #145,PR #146, #155) - Run sphinx gallery in CI (PR #146) - Remove notebooks from repo because available in doc (PR #156) - Build wheels in CI (#157) - Move from travis to GitHub Action for Windows, MacOS and Linux (PR #148, PR #150) - Partial Optimal Transport (PR#141 and PR #142) - Laplace regularized OTDA (PR #140) - Multi source DA with target shift (PR #137) - Screenkhorn algorithm (PR #121) Closed issues - Bug in Unbalanced OT example (Issue #127) - Clean Cython output when calling setup.py clean (Issue #122) - Various Macosx compilation problems (Issue #113, Issue #118, PR#130) - EMD dimension mismatch (Issue #114, Fixed in PR #116) - 2D barycenter bug for non square images (Issue #124, fixed in PR #132) - Bad value in EMD 1D (Issue #138, fixed in PR #139) - Log bugs for Gromov-Wassertein solver (Issue #107, fixed in PR #108) - Weight issues in barycenter function (PR #106) -- Rémi Flamary Web: http://remi.flamary.com Tel: +33 (0)4 92 07 63 80 Laboratoire Lagrange, UMR CNRS 7293 Observatoire de la Côte d'Azur Université de Nice Sophia-Antipolis

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