when I run this code I get Undefined function or variable 'U'.

2018 11 4

1 个回答

更新时间：2021 8 20

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0 个投票

for i=1:n       
    h=u(1:n,i:i);
    b=a(i,1);
    if b>0.0001
     U(1:n,i:i)=h/sqrt(b);
    end     
end
[N,M]=size(U);

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Jan 2018-11-6

By the way, i:i is a waste of time. Use i only.

Bruno Luong 2018-11-4

1 个投票

MATLAB makes distinction between upper case and lower case in variable name. If you call

[u,d,v]=svd(K);

then you have to use small u afterwards, or the opposite.

Jan 2018-11-6

@Rui Mauaie: And a copy of the complete error message.

Bruno Luong 2018-11-6

He also deleted the code he posted previously making my comment difficult to understand.

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