mlx.core.vjp

vjp(fun: Callable, primals: list[array], cotangents: list[array]) → tuple[list[array], list[array]]

Compute the vector-Jacobian product.

Computes the product of the cotangents with the Jacobian of a function fun evaluated at primals.

参数:

• fun (Callable) -- A function which takes a variable number of array and returns a single array or list of array.

• primals (list(array)) -- A list of array at which to evaluate the Jacobian.

• cotangents (list(array)) -- A list of array which are the "vector" in the vector-Jacobian product. The cotangents should be the same in number, shape, and type as the outputs of fun.

返回:

A tuple with the outputs of fun in the first position and the vector-Jacobian products in the second position.

返回类型:

tuple(list(array), list(array))

示例

import mlx.core as mx

outs, vjps = mx.vjp(mx.sin, (mx.array(1.0),), (mx.array(1.0),))