Make all Combinations of Bits

Produce bit array of N bits with all combinations of 1s and 0s.

MAKEBITS - Produce bit array of N bits with all combinations of 1s and 0s.

Example: makebits(3)' produces

0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1

but of course you can flip it to the transverse.

I used this for testing communications channels.