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Details of Map Repetition

The nth pop (within a map) uses the same seed to do the interactions. This guarantees that the same actors are activated in the same order for corresponding populations, since (when there is no mutation) the sequence always calls exacly the same random numbers in corresponding cycles as follows:

1. pick x coord for active actor

2. pick y coord for active actor

3. pick bit to be checked for interaction

4. pick direction for the neighbor (if off map, pick another).

5. if match, pick a bit to change

(Note that step 4 will be done the same number of times for corresponding pops since the same actor will have been drawn in corresponding cycles. This will keep the sequence of actors to be activated the same in corresonding pops.)

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University of Michigan Center for the Study of Complex Systems
Contact cscs@umich.edu.
Revised December 20, 1996.