Bug in statistics

[Sprotiel]

I think every per species average wrongly divides the sum of the relevant properties by the total number of bots instead of dividing by the number of bots of the species. E.g. if you start a sim with 10 vegs and 5 animals with 5000 nrg each, the average energy for vegs will appear as 3333, and for animals as 1667.

[EricL]

You are exactly right.  Nice find.  Fixed in 2.42.9q.

[Sprotiel]

It seems my former bug report was incorrect. In 2.42.9t (and probably also in .9u), mutations and mutations/DNA length appear to be incorrectly multiplied by a factor (total number of bots / number of bots in species).

[EricL]

It seems my former bug report was incorrect. In 2.42.9t (and probably also in .9u), mutations and mutations/DNA length appear to be incorrectly multiplied by a factor (total number of bots / number of bots in species).

I've been looking at this and I don't think this is the case.

Mutations is the average # of mutations per individual for that species so it is calculated as the sum of the all mutations for all members of the speces divided by the number of individuals in the species.

Mutations/DNA Length is the same just divided by dna length I.e.  Sum of (number of mutations for bot / DNA lenght of bot) for all bots in species.

I may be missing somehting, but I think it's correct.

[Sprotiel]

I may be missing somehting, but I think it's correct.

It probably is. I've seen since that I had some bots with a very large number of mutations. So the problem is just that the average is sometimes misleading.

[Numsgil]

Yeah, I think using averages isn't the best idea.  Quartile plots vs. time would probably be better.  It would let you see both the average and the spread.

[EricL]

And historgrams.  I'd love to see the distribution of offspring, nrg levels, percentage of coding DNA, etc....  I have a whole list of contained little projects like that someone with spare time could work on....