Index exceeds matrix dimensions when I tried to execute this code.

for i = 1:I %%I = 10
    for k = 1:K %%K = 100
        rate(i,k,:) = W*log2(1+sinr);  %%W = 20*10^6
        energy_eff(i,k) = (b(i,k)*rate(i,k)/P_ci);  %%b=linspace(0,1,10)

[KSSV]

Which line it showed error? YOu need to check the dimensions of b and rate....are they of size 10*100?

[Saint Dee]

On the fourth line : energy_eff(i,k)

Answer 1

[Walter Roberson]

b=linspace(0,1,10)

so it is a row vector. But in the line

        energy_eff(i,k) = (b(i,k)*rate(i,k)/P_ci);  %%b=linspace(0,1,10)

you are trying to index b(i,k) which is going to fail as soon as i becomes 2.

[Saint Dee]

Thank you Walter. How do I correct that please? There are no strict rules for the values.I really want to plot sinr against energy_eff and rate. Thanks.

[Walter Roberson]

I do not know what your equations are. For this purpose, element-by-element multiplication is important compared to matrix multiplication.

Also, I just noticed that you assign to rate(i,k,:) but on that 4th line you access rate(i,k) with no third dimension.

My guess is you need

   b'*squeeze(rate(i,k,:))

or something like that. Or

dot(b, squeeze(rate(i,k,:)) )