Why does my variable iterate only once in my while loop?

Ikenna Nebolisa

2020 9 27

0 个回答

8 次查看（30 天）

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x = 1;
y = 1;
times1 = 0;
times2 = 0;
while x <= size(VideoNumber)
    if number == VideoNumber(x)
        times1 = times1+1;
        x=x+1
    else
        x=x+1
    end
end

Returns:

x =
     2

When instead it should iterate around 4900 times

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Sindar 2020-9-28

编辑：Sindar 2020-9-28

在 MATLAB Online 中打开

I'm not saying hard-code in 4934. But, if the number of iterations is known before the loop starts (here, because the size of the data isn't changed during the loop) then it makes sense to use a for loop instead of a while loop.

Also, if all you are doing is counting the number of elements equal to a certain value, any sort of loop is unnecessary:

times1 = nnz(VideoNumber == number);