function res=crossover(grp,parent,p_cross,numSVM)
%GA crossover function
%The return value refers to postcrossover the group
%The mother refers to the original group
res=zeros(99,numSVM);
for i=1:99
    first=parent(i,1);
    second=parent(i,2);
    if Bernoulli(p_cross)
        
        pos=round(numSVM*rand(1));
        while pos==0
            pos=round(numSVM*rand(1));
        end
        
     res(i,:)=exchange(grp(first,:),grp(second,:),pos);
     
    else
        res(i,:)=grp(first,:);
    end
     
    
end