bayespy.nodes.Take

class bayespy.nodes.Take(node, indices, plate_axis=-1, **kwargs)

Choose elements/sub-arrays along a plate axis

Basically, applies np.take on a plate axis. Allows advanced mapping of plates.

Parameters:

• node (Node) – A node to apply the take operation on.

• indices (array of integers) – Plate elements to pick along a plate axis.

• plate_axis (int (negative)) – The plate axis to pick elements from (default: -1).

See also

numpy.take

Examples

>>> from bayespy.nodes import Gamma, Take
>>> alpha = Gamma([1, 2, 3], [1, 1, 1])
>>> x = Take(alpha, [1, 1, 2, 2, 1, 0])
>>> x.get_moments()[0]
array([2., 2., 3., 3., 2., 1.])

__init__(node, indices, plate_axis=-1, **kwargs)

Methods

__init__(node, indices[, plate_axis])
add_plate_axis(to_plate)
broadcasting_multiplier(plates, *args)
delete()	Delete this node and the children
get_mask()
get_moments()
get_pdf_nodes()
get_shape(ind)
has_plotter()	Return True if the node has a plotter
lower_bound_contribution([gradient])
move_plates(from_plate, to_plate)
plot([fig])	Plot the node distribution using the plotter of the node
random()
set_plotter(plotter)

Attributes

plates
plates_multiplier	Plate multiplier is applied to messages to parents