jax.random.dirichlet(key, alpha, shape=None, dtype=<class 'numpy.float64'>)[source]ΒΆ

Sample Dirichlet random values with given shape and float dtype.

  • key (ndarray) – a PRNGKey used as the random key.

  • alpha (Any) – an array of shape (..., n) used as the concentration parameter of the random variables.

  • shape (Optional[Sequence[int]]) – optional, a tuple of nonnegative integers specifying the result batch shape; that is, the prefix of the result shape excluding the last element of value n. Must be broadcast-compatible with alpha.shape[:-1]. The default (None) produces a result shape equal to alpha.shape.

  • dtype (Any) – optional, a float dtype for the returned values (default float64 if jax_enable_x64 is true, otherwise float32).

Return type



A random array with the specified dtype and shape given by shape + (alpha.shape[-1],) if shape is not None, or else alpha.shape.