Excluding one vector from another vector with repetition

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Sarah Ansari
Sarah Ansari 2018-6-18
评论： Bruno Luong 2020-12-9
I want to get a new vector that has elements of S excluding the values in C with repetition.
S=[1 3 0 2 0 0] C=[0 2] B=setdiff(S,C) B=[1 3] while I need the output as [1 3 0 0]. I need the other zeros in the output but setdiff removes all the zeros. I also tried ismember function and it has the same result.
B=S(~ismember(S,C)) B=[1 3]
To make it clearer, I need to exclude a from s with repetition while keeping the same order of elements in s.

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采纳的回答

Paolo
Paolo 2018-6-18
S=[1 3 0 2 0 0];
C=[0 2];
[~,col] = ismember(C,S);
S(col) = [];
S =
1 3 0 0
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Jan
Jan 2020-12-9
Please open a new thread, because this is a different question. Include some examples, which clarify uniquely, which outputs are wanted for which input.

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更多回答（1 个）

Bruno Luong
Bruno Luong 2020-12-9
编辑：Bruno Luong 2020-12-9
From Alexander Gallard above comment (I agree he should open a new thread)
"This method didn't work for me if my C was, say, [0,0,2]
If I want to remove two zeros this wasn't quite cutting it.'
A=[3 1 0 2 0 0 4];
B=[0 7 0 2];
D = DiffRep(A,B)
function D=DiffRep(A,B)
D=A(~ismember(count(A),count(B),'rows'));
end
function C=count(A)
A=A(:);
[C,i]=sort(A);
j=find([true;diff(C)]);
lgt=diff(j);
c=ones(size(A));
c(j(2:end))=1-lgt;
c=cumsum(c);
c(i)=c;
C=[A,c];
end
gives result
A =
3 1 0 2 0 0 4
B =
0 7 0 2
D =
3 1 0 4

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