pyphi.substrate_generator.unit_functions.boolean_function#

pyphi.substrate_generator.unit_functions.boolean_function(element, weights, state, on_inputs=(), **kwargs)[source]#

An arbitrary boolean function of the element’s inputs.

The element is ON exactly when the tuple of its (weighted) input states is one of on_inputs. All weights must be 0 or 1.

Parameters:

  • element (int) – Index of the element whose output is being computed.

  • weights (numpy.ndarray) – The weight matrix (entries restricted to 0 or 1).

  • state (numpy.ndarray) – The state of the substrate.

  • on_inputs (tuple of tuple, optional) – The input patterns for which the element is ON. All patterns must have the same length, which must equal the number of nonzero input weights.

Returns:

bool – The output of the element.

Raises:

  • NotImplementedError – If any weight is neither 0 nor 1.

  • ValueError – If the on_inputs patterns differ in length, or their length does not match the number of nonzero input weights.