The program permRand.py creates a set of N arrays each containing M indices. Each index can have the value 0 or 1. The number of ones is set by the parameter k. An additional constraint is that each array should only share a maximum of one additional index with all other arrays. For example, a setup like M=10, k =3, N= 10 results in the following arrays:
[[0 1 0 0 1 1 0 0 0 0]
[1 0 0 0 0 0 1 0 1 0]
[0 0 1 1 0 0 0 1 0 0]
[0 0 0 0 0 1 0 1 0 1]
[0 1 1 0 0 0 0 0 0 1]
[0 0 0 1 0 0 0 0 1 1]
[0 0 1 0 0 1 1 0 0 0]
[1 1 0 0 0 0 0 1 0 0]
[1 0 1 0 1 0 0 0 0 0]
[0 0 0 1 1 0 1 0 0 0]]In addition, the -t switch controls a target spread, allowing to create more evenly distributed array indices.