Summary:
Related https://github.com/pytorch/pytorch/issues/38349
Implement NumPy-like function `torch.broadcast_to` to broadcast the input tensor to a new shape.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48997
Reviewed By: anjali411, ngimel
Differential Revision: D25663937
Pulled By: mruberry
fbshipit-source-id: 0415c03f92f02684983f412666d0a44515b99373
Summary:
Fixes https://github.com/pytorch/pytorch/issues/43837
This adds a `torch.broadcast_shapes()` function similar to Pyro's [broadcast_shape()](7c2c22c10d/pyro/distributions/util.py (L151)) and JAX's [lax.broadcast_shapes()](https://jax.readthedocs.io/en/test-docs/_modules/jax/lax/lax.html). This helper is useful e.g. in multivariate distributions that are parameterized by multiple tensors and we want to `torch.broadcast_tensors()` but the parameter tensors have different "event shape" (e.g. mean vectors and covariance matrices). This helper is already heavily used in Pyro's distribution codebase, and we would like to start using it in `torch.distributions`.
- [x] refactor `MultivariateNormal`'s expansion logic to use `torch.broadcast_shapes()`
- [x] add unit tests for `torch.broadcast_shapes()`
- [x] add docs
cc neerajprad
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43935
Reviewed By: bdhirsh
Differential Revision: D25275213
Pulled By: neerajprad
fbshipit-source-id: 1011fdd597d0a7a4ef744ebc359bbb3c3be2aadc
Summary:
Creates multiple new test suites to have fewer tests in test_torch.py, consistent with previous test suite creation like test_unary_ufuncs.py and test_linalg.py.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47356
Reviewed By: ngimel
Differential Revision: D25202268
Pulled By: mruberry
fbshipit-source-id: 75fde3ca76545d1b32b86d432a5cb7a5ba8f5bb6
