Carlos wrote: > The genetic algorithm that Im using (GA) generates solutions for a given > problem, expressed in a list, this list is composed by integers. Every > element in the list takes 8 integers, is a little messy but this is because > > List [0] = Tens X position > List [1] = Units X position > List [2] = Decimals X position > List [3] = If < than 5 the number is negative, else is positive > > Then if the result is List = [6, 1, 2, 3] the X position equals -612.3. > This is the same for the Y position. If there are 10 elements the list > is going to be 80 integers long and if there are 100 elements, well you > get a very long list... > > With this in mind my question would be, how can I keep track of this > information? I mean how can I assign this List positions to each > element? This is needed because this is going to be a long list and the > GA needs to evaluate the position of each element with respect to the > position of the other elements. So it needs to know that certain numbers > are related to certain element and it needs to have access to the size, > level, name and parent information... I hope that this is clear enough.
I will assume there is a good reason for storing the coordinates in this form... Do the numbers have to be all in a single list? I would start by breaking it up into lists of four, so if you have 10 elements you would have a list of 20 small lists. It might make sense to pair the x and y lists so you have a list of 10 lists of 2 lists of 4 numbers, e.g. [ [ [6, 1, 2, 3], [7, 2, 8, 4] ], ...] Another thing to consider is whether you might want to make a class to hold the coordinate values, then you could refer to x.tens, x.units, x.decimal, x.sign by name. If you need a single list for the GA to work, one alternative would be to make converters between the nested representation and the flat one. Alternately you could wrap the list in a class which provides helpful accessors. HTH Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
