Why do i have the "Array indices must be positive integers or logical values" error?

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Hi, im new in matlab and im trying to move one place to the right the elements of an array
cadena2 = [1,2,3,4,5];
n = length(cadena2);
aux = cadena2(n);
for i = n:-1:1
cadena2(i)=cadena2((i-1));
end
cadena2(1)=aux;
cadena2
i have this error:
Array indices must be positive integers or logical values.
Error in Clase01102 (line 22)
cadena2(i)=cadena2((i-1));
if you can help i really apreciate it

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Jon
Jon 2021년 10월 22일
편집: Jon 2021년 10월 22일
Your problem is that in your loop i goes from 5 down to 1 but you index cadena2((i-1), and for the last loop when i = 1 this equals zero which is not allowed. Indices must be positive integers
The MATLAB function circshift is very helpful for this kind of operation. You can do it in one line
y = circshift(cadena2,1)

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