igazor wrote: ↑February 17th, 2019, 8:46 am
I've never been entirely clear on what that setting does as I never use the Bin as a source of immigration genetics. But I believe that when on False, it will tend to keep using the same randomly selected genetic donor repeatedly. Thus to get more variation on the incoming immigrants one would want True as
Sarah_Sims says.
I interpret the description differently. Mind you, I don't know how the code actually works, but taking the description literally suggests that when
Equal Chance to All Bin Sims is set to false then...well lets consider an example. Say you only have 2 households in your bin. Household 1 has a single sim. Household 2 has 5 sims. With
Equal Chance to All Bin Sims set to
false SP would first "randomly choose a bin household." Sounds to me like a 50% chance between both households. Then SP would " randomly chooses a sim from that household." So, if SP chose Household 1 there would be a 100% chance of choosing the only sim in that household, so 50% overall chance of that sim being chosen. But if Household 2 is chosen, then the game would move on to to the next step and randomly choose between the 5 sims in that household. This implies each sim in Household 2 then has a 20% chance of being chosen, for an overall chance of 10% for each sim in Household 2. If I'm reading the description correctly, then the single sim has a 50% chance of being chosen by SP for immigration genetics and the sims in Household 2 each have a 10% chance.
With this interpretation in mind for this example, setting
Equal Chance to All Bin Sims to
true would mean each of those 6 sims would have an equal ~16.7% of being chosen.
The question in my mind then is why would you set
Equal Chance to All Bin Sims to false? Consider another example which just popped into my head as I wrote this post. Say you have 10 families in your bin. Each household has a mom, and dad, and 2-6 children. There's not going to be a lot of genetic diversity between each of the children and between the children and the parents. If you look at each household as an individual pool of genetics to use, maybe you'll get more diversity overall if SP selects households first instead of giving an equal chance to each sim? Dunno, haven't had my coffee yet and really thought that out.
I have 13 households with 8 sims each set up to use for SP immigration genetics. I used CC and EA sims and deliberately chose a wide variety of looks. So I keep
Equal Chance to All Bin Sims to true. Then I use
Immigration Disallow Bin by House to deselect other households I might have in the bin (caveat here that a discussion on Chatterbox long ago led me to believe that this setting isn't honored by SP).