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 Topic: Evolutionary Computation, Stuff that drives AEs nuts < Next Oldest | Next Newest >
Wesley R. Elsberry

Posts: 4991
Joined: May 2002

Here's an interesting graph:

I've put a 20 pixel border around this. On the X axis, there is the number of correct letters (treated as a continuous scale), and mutation rate is on the Y axis. I've taken terms from the "expected number of correct letters in a mutated string" calculation and subtracted the term for expected conversion of correct to incorrect from the expected conversion of incorrect to correct. Black is a net 28 expected new incorrect letters, white is a net 2 expected new correct letters, and the border color is where the two terms cancel each other out. One can see at a glance that as one considers candidates with more matching letters, only lower mutation rates are going to give a good chance of matching all the letters.

And here's the same graph, but with the net 1 expected new incorrect values shifted to black, too, making a contour visible, and showing how the mutation rate interacts with expectations for new candidate strings:

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"You can't teach an old dogma new tricks." - Dorothy Parker

 419 replies since Mar. 17 2009,11:00 < Next Oldest | Next Newest >

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