ERROR: Array indices must be positive integers or logical values. Can anyone please help, Thank You!

clc
clear all;

%Parameters defined
PsByN_0dB = 3;                                                     
PsByN_0=10.^(PsByN_0dB/10);
UmaxdB = 6.0;
UmaxN_0=10.^(UmaxdB/10);

Qu=[0.1:0.1:2];
QoS_Component_u=10.^(Qu);

  
for i=1:length(QoS_Component_u)
    u=QoS_Component_u(i);                                          

mui(i) =  (1/u)*log((PsByN_0*u*exp(-PsByN_0*u)*(expint(PsByN_0*u(u*UmaxN_0+PsByN_0*u)+PsByN_0*u))-((exp(PsByN_0*u(u*UmaxN_0+PsByN_0*u))/(u*UmaxN_0+PsByN_0*u+1))))-(PsByN_0*u*exp(-PsByN_0*u)*(expint(PsByN_0*u(PsByN_0*u)+PsByN_0*u))-(exp(PsByN_0*u*(PsByN_0*u)))/(PsByN_0*u+1)));

end

Answer 1

[Star Strider]

I suspect the problem is with this term —

u(u*UmaxN_0+PsByN_0*u)

and everywhere else something similar to that is used. The value inside the parenthesis is likely not an integer greater than zero, or a logical value.

You will need to determine how best to solve that.