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Expose the current implementation of jax.numpy.trapz as jax.scipy.integrate.trapezoid instead. Fixes #17244
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Original file line number | Diff line number | Diff line change |
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# Copyright 2023 The JAX Authors. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# https://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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from __future__ import annotations | ||
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from functools import partial | ||
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import scipy.integrate | ||
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from jax import jit | ||
from jax._src.numpy import util | ||
from jax._src.typing import Array, ArrayLike | ||
import jax.numpy as jnp | ||
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@util._wraps(scipy.integrate.trapezoid) | ||
@partial(jit, static_argnames=('axis',)) | ||
def trapezoid(y: ArrayLike, x: ArrayLike | None = None, dx: ArrayLike = 1.0, | ||
axis: int = -1) -> Array: | ||
# TODO(phawkins): remove this annotation after fixing jnp types. | ||
dx_array: Array | ||
if x is None: | ||
util.check_arraylike('trapz', y) | ||
y_arr, = util.promote_dtypes_inexact(y) | ||
dx_array = jnp.asarray(dx) | ||
else: | ||
util.check_arraylike('trapz', y, x) | ||
y_arr, x_arr = util.promote_dtypes_inexact(y, x) | ||
if x_arr.ndim == 1: | ||
dx_array = jnp.diff(x_arr) | ||
else: | ||
dx_array = jnp.moveaxis(jnp.diff(x_arr, axis=axis), axis, -1) | ||
y_arr = jnp.moveaxis(y_arr, axis, -1) | ||
return 0.5 * (dx_array * (y_arr[..., 1:] + y_arr[..., :-1])).sum(-1) |
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# Copyright 2023 The JAX Authors. | ||
# | ||
# Licensed under the Apache License, Version 2.0 (the "License"); | ||
# you may not use this file except in compliance with the License. | ||
# You may obtain a copy of the License at | ||
# | ||
# https://www.apache.org/licenses/LICENSE-2.0 | ||
# | ||
# Unless required by applicable law or agreed to in writing, software | ||
# distributed under the License is distributed on an "AS IS" BASIS, | ||
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
# See the License for the specific language governing permissions and | ||
# limitations under the License. | ||
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# Note: import <name> as <name> is required for names to be exported. | ||
# See PEP 484 & https://github.com/google/jax/issues/7570 | ||
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from jax._src.scipy.integrate import ( | ||
trapezoid as trapezoid | ||
) |
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