Is it a mistake that the function sum?
2 次查看(过去 30 天)
显示 更早的评论
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.
0 个评论
回答(1 个)
James Tursa
2020-2-19
编辑:James Tursa
2020-2-19
Welcome to the world of floating point arithmetic.
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Argument Definitions 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!