pymc.distributions.shape_utils.change_dist_size

pymc.distributions.shape_utils.change_dist_size(dist, new_size, expand=False)

Change or expand the size of a Distribution.

Parameters:

dist:

The old distribution to be resized.

new_size:

The new size of the distribution.

expand: bool, optional

If True, new_size is prepended to the existing distribution size, so that the final size is equal to (*new_size, *dist.size). Defaults to false.

Returns:

distTensorVariable

A new distribution variable that is equivalent to the original distribution with the new size. The new distribution will not reuse the old RandomState/Generator input, so it will be independent from the original distribution.

Examples

x = Normal.dist(shape=(2, 3))
new_x = change_dist_size(x, new_size=(5, 3), expand=False)
assert new_x.eval().shape == (5, 3)

new_x = change_dist_size(x, new_size=(5, 3), expand=True)
assert new_x.eval().shape == (5, 3, 2, 3)