could anyone help me how to solve the issue.

code:
A=[ 12 11 10 9;
8 7 6 5;
4 3 2 1]
B=[1 2 3 4;
5 6 7 8;
9 10 11 12]
C= partitions(3)
total = length(C)
idx = randperm(total,1) 
D = C(idx)
partdisp(D)
for len_partition=1:length(D)  
    for len_cluster=1:length(D{len_partition})
          display_user_inside_cluster=(D{len_partition}{len_cluster})
                for b =1:size(B,2)
                    for a =1:size(A,1)
                         rate(a,b) =((A(a,b)).*(B(a,b)))
                    end
                end 
        overallrate(len_cluster)= sum(sum(rate))
    end
end
totalrate=sum(overallrate)

The above code executes and gives the result.In this code based on command partdisp(D),the overallrate(len_cluster)= sum(sum(rate)) gets calculated.

Could anyone help me how to make the command partdisp(D) based on overallrate(len_cluster)= sum(sum(rate)),

i.e,I want to make the code in the reverse order to execute.

Could anyone please help me on this.

[Rik]

What is the reason you put partdisp before the loop then?

[Jan]

You can replace

for b =1:size(B,2)
   for a =1:size(A,1)
      rate(a,b) =((A(a,b)).*(B(a,b)))
   end
end 

by

rate = A .* B;

But why is this called inside the loops at all? It has the same value.