replace duplicate value by 0 in matrix or vector
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How do we replace duplicate value by 0 in matrix or vector ?
for example
Input:
b = 1 2 1 3
Output::
b= 1 2 0 3
Thanks
采纳的回答
Andrei Bobrov
2019-10-15
编辑：Andrei Bobrov
2019-10-15
b = [1 2 1 3];
[a,c] = unique(b,'first');
out = zeros(size(b));
out(c) = a;
更多回答（2 个）
Adam
2019-10-15
[C,ia] = unique( b );
b( setdiff( 1:numel(b), ia ) ) = 0;
Jos (10584)
2019-10-15
% for small vectors:
b = [1 2 1 3 2 1 4 2]
b(sum(triu(b == b')) > 1) = 0
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