Error showing as "index exceeds the number of array elements (3)"

LB=[0 0 0]; 
UB=[10 10 10]; 

m=4; 
n=100; 
for i=1:n
for j=1:m
x0(i,j)=round(LB(j)+rand()*(UB(j)-LB(j)));
end
end
x=x0; % initial population
v=0.1*x0; % initial velocity
for i=1:n
f0(i,1)=fprofit(x0(i,:),1);
end

Answer 1

[James Browne]

Greetings,

Without knowing what you are trying to accomplish with your code, I couldn't really begin to fix it for you but I can tell you tha the problem is coming from the following line of code:

x0(i,j)=round(LB(j)+rand()*(UB(j)-LB(j)));

I can also tell you that the problem is happening because both variables "UB" and "LB" are vectors with 3 elements. This means that for both variables, the range of legal index values is 1-3;

In your code, the second for loop iteration ranges ( "j" ) eceeds the legal range of the index values for "UB" and "LB". I can also tell you that the problem occurs when the second for loop iterator, "j", reaches 4.

If you change the value of "m" from 4 to 3, this would fix your problem, as long as "m" does not need to be a value of 4 for some other reason.

If you can describe what you are trying to accomplish, I or someone else may be able to help you get there.

Hope that helps~

[Biswajit Das]

Thank you...

[James Browne]

You bet!