Troubleshooting MATLAB Index Out of Bounds Error: Tips and Solutions

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SUMMARY

The forum discussion addresses a MATLAB "Index Out of Bounds" error encountered when attempting to access an element in an array that does not exist. The specific error message indicates that the variable 'x' has only one element, yet the code attempts to access the second and third elements. The solution involves ensuring that the input to the function 'fit_fun' contains at least three elements, which can be achieved by modifying the loop or the data structure being passed to the function.

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dyfw
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Dear forummers,

I'm trying to solve a problem that is displayed in MATLAB below:-

? Attempted to access x(2); index out of bounds because numel(x)=1.

Error in ==> fit_fun at 5
Fit_fun_val= x(1)^2 + x(2)^2 + x(3)^2;

Error in ==> jack_immune at 47
Sel_Ab_cri(ksel)=fit_fun(Ini_Ab(:,ksel));

I understand that (Ini_Ab(:,ksel)) has to have 3 numbers/datas, but the coding is looping.
How am i able to modify the code as to have 3 numbers as well as a loop? Sorry for my poor explanation.

Part of the code is as below:-

for ksel=1:pop_size
Sel_Ab_cri(ksel)=fit_fun(Ini_Ab(:,ksel));
end

Thanks in advance.
PS: Do let me know if i need to post the full code. Thanks.
 
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dyfw said:
? Attempted to access x(2); index out of bounds because numel(x)=1.
You don't need to look at anything else. numel function returns the number of array elements. You attempted to access the 2nd element while the array has only one element.
 

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