Pwc
class boulderopal.graph.Pwc(operation, value_shape, durations, batch_shape)
A piecewise-constant tensor-valued function of time (or batch of such functions).
You can use the arithmetic operators +
, -
, *
, **
, /
, //
, and @
to perform operations between two Pwc objects or between a Pwc and a Tensor.
Variables
- values (Tensor) – The values of the function on the piecewise-constant segments.
- durations (np.ndarray) – The durations of the constant segments.
- value_shape (tuple) – The shape of the function value.
- batch_shape (tuple) – The shape of the batch in the function.
- name (str) – The name assigned to the node.
SEE ALSO
Graph.pwc
: Operation to create piecewise-constant functions.
Notes
The value of a Pwc node can be fetched in a graph calculation by adding its name in the output_node_names parameter for the function call. This will add an item to the output dictionary in the calculation result object, whose key is name. The item’s value will be a list of dictionaries, with the “duration” and “value” of the piecewise-constant function at each segment. Batch dimensions of the function will be represented as outer lists.
For more information on Pwc nodes see the Working with time-dependent functions in Boulder Opal topic.