GA optimisation issues please help

Hi

options = gaoptimset('Generations',50,'PopulationSize',42);
nonlcon=@constraint;
[x,fval,exitflag] = ga(@objectiveFun,... 
  32,[],[],[],[],lb,[],nonlcon,options);

^^ thats my GA bit if I want to plot my received values from the [x,fval,exitflag] = ga(@objectiveFun,... 32,[],[],[],[],lb,[],nonlcon,options);

vs Time and not the generations/Population size bits is it possible and how can I do it ?