How to cycle through elements in an array in Matlab
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Hello there, I am trying to cycle through the elements in an array given a specified number of iterations. For other languages where the first element is 0, I can easily utilize the modulo command and so when the iteration is equal to the modulo it will evaluate to 0 and the array in question will start from the beginning again. However, with MATLAB, since the elements start with 1, I cannot utilize the same idea. How do I get around this? And very much possibly without the use of if else anywhere. Thank you!
采纳的回答
You can utilize the same idea. Just offset by one inside outside mod():
A = [2 3 5 7];
% Illustrate the mod() cycle with offset
for iteration = 1:8
idx = mod(iteration-1,length(A))+1
end
% Index into the array
for iteration = 1:8
idx = mod(iteration-1,length(A))+1;
A(idx)
end
更多回答（1 个）
Voss
2024-4-19
1 个投票
To account for indexing in MATLAB starting with 1, subtract 1 from the iteration number, perform mod(), then add 1 to the result.
idx = mod(iteration-1,N)+1;
That will give idx values starting with 1 when iteration is 1, and as iteration increases, idx increases to N and then repeats starting with 1 again when iteration is N+1, and so on.
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