how to fix this error 'Index in position 2 exceeds array bounds.'?

I have a problem with this line of code B(:,g)=Popbest(:,iBest); fbest(g)= Fitbest(iBest); I tried it a lot and changed the numbers, but the error remains. The Error is Index in position 2 exceeds array bounds.

I hope someone has a solution to this problem.

Answer 1

[Joel Lynch]

The proximate reason for the error is that "Popbest" is empty, and so acessing the first column by Popbest(:,1) throws an error.

The most likely root cause is that the two if statements on lines 158 and 162 prevent "Popbest" from being defined in certain cases. A good approach is to make sure it has a consistent size set before the if statements, then set an alternative value in else branches.

[NURSYAFIKAH MARZUKI]

After set popbest also got error. Can show me how to do that?

[Joel Lynch]

Can you attach your current script?

[NURSYAFIKAH MARZUKI]

Here is the current script.

[Joel Lynch]

The function effi does not appear to do anything, can you describe how you want it to work? currently effi just returns the division of global constants Z=N=W/Q.

Your plots are meant to plot rows of data in B

plot(1:GEN,B(1,:)); plot(1:GEN,B(2,:)); plot(1:GEN,B(3,:)); 

but your main for loop over "g" appends a column for each g. However the data in Popbest is always a single scalar, so you end up with a row vector B(1:GEN,1), that never has more than one row.