Is it a mistake that the function sum?
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Please see the follow code:
N=3;
sum(sum(eye(N)-ones(N,N)/N))
The MATLAB answer is 3.3307e-16, but the right answer is 0.
But it is true if N is 2, 4, 8 as follows:
N=2;
sum(sum(eye(N)-ones(N,N)/N))
N=4;
sum(sum(eye(N)-ones(N,N)/N))
N=8;
sum(sum(eye(N)-ones(N,N)/N))
These right answers are 0, and the MATLAB answer is 0 too.
回答（1 个）
James Tursa
2020-2-19
编辑：James Tursa
2020-2-19
1 个投票
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2020-2-19
2020-2-19
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