Constraint Formulation doesnt work / is not applied to solution
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Hi everybody,
I have a problem with a specific constraint formulation. the problem requires to choose 4 players from a player pool (its a soccer problem) and maximizes expected points.
I want the optimizer to only pick players from a certain number of teams. For this I tried to use this:
% defining a new optimization variable
used_teams = optimvar('used_teams',length(teams),1,'Type','integer','LowerBound',0,'UpperBound',1);
% run variables
i = 1:length(teams);
t = 1:length(player_def);
%apply team info to optimization variable
soccer_lineup.Constraints.stack1 = used_teams(i) <= sum(def_team_info(i,t)*defense_lineup(t));
%set the maximum numbers of teams
def_teams = sum(used_teams);
soccer_lineup.Constraints.stack2 = def_teams <= 2;
My inspiration to code it like this came from a Github code in another language looking very similar:
The problem is, that it isnt applied to the problem. I can set the number of used teams to 0 and I still get a feasible solution (which should be impossible).(Yes the example from the other code is for more than 3 teams, but i want the optimizer to stack players from 2 teams. )
Does anyone see the mistake?
I would appreciate your help.
Kind regards,
Christian
8 commentaires
Walter Roberson
le 18 Déc 2019
The input file would help. There is too much code for me to read it and mentally model it all and figure out all the combinations of circumstances in an input file that could potentially lead to problems.
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