could anyboby help me to solve the error

Bmax=20;  
noise=10; 
E = [2 3 0 0 5;
    5 6  0 0 4;
    1 9  0 0 3]
P = [1 5 0 0 6;
    4 3 0 0 2;
    7 8 0 0 9]
U=sort(E,'descend')
V=sort(P)
throughput =(Bmax.*log2(1+((V(i).*U(i))./(noise+(sum(U,1,i-1).*V(i))))))

If i run the code i am getting Error in

throughput=(Bmax.*log2(1+((V(i).*U(i))./(noise+(sum(U,1,i-1).*V(i)))))) 

Subscript indices must either be real positive integers or logicals.

Could anyone help me to solve the error.

[Adam]

i is not defined anywhere in the code you gave us so could be anything.

This error is easy to locate though if you just use the stop/pause on errors option from the breakpoints menu in the editor and use the command line to investigate your variables when it stops. You will find that one of your indices into an array on that line is not a real positive integer or a logical.

The most obvious candidates for the error would seem to be that i is 0 or negative or floating point or that you have created a variable somewhere called 'sum' that it is trying to index into using U, which clearly contains 0s

[Prabha Kumaresan]

sorry its my mistake where i indicates the number present in U and V matrix.could you please help me how to define i in the code in such a way i value needs to implemented in the throughput equation.

Answer 1

[Greg Heath]

i is undefined

However if i were defined U(i) would probably be incorrect because U is 2 dimensional.

You probably have to define a for loop over i

Hope this helps.

Thank you for formally accepting my answer

Greg

[Prabha Kumaresan]

could you please tell me how to define i in a for loop.