laser.cohorts.utils

utils

Utility helpers for the laser.cohorts package.

static_routing

static_routing(routing_2d, nticks)

Return a time-invariant 3-D routing view via np.broadcast_to.

Creates a read-only (nticks, nnodes, nnodes) view of a 2-D routing matrix without allocating a copy. Pass the result directly to Migration(..., routing=static_routing(r2d, nticks)).

Parameters:

Name	Type	Description	Default
routing_2d	ndarray	Shape (nnodes, nnodes) routing matrix where routing_2d[i, j] is the unnormalised weight from node i to node j.	required
nticks	int	Number of simulation ticks.	required

Returns:

Type	Description
ndarray	np.ndarray: Read-only shape (nticks, nnodes, nnodes) broadcast view. No data is copied; memory usage is O(nnodes²).

Example

r2d = np.array([[0, 1], [1, 0]], dtype=np.float64) r3d = static_routing(r2d, nticks=365) r3d.shape (365, 2, 2) r3d.base is r2d False import numpy as np; np.shares_memory(r3d, r2d) True