Intersect for multiple vectors
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I have three vectors in a for loop.
A=[1 2 3 7];
B=[2 2 4 6];
C=[1 3 2 5];
D=[];
I want to use intersect so that I will avoid elements that are common for the vectors. Like:
I wonder if there is a function for this? I read about mintersect, but I want to find all elements that exist in more than one vector
for i=1:length(A)
if intersect(A,B) || intersect(A,C) || intersect(B,C)
D(i)=0;
end
else
D(i)=1;
end
4 个评论
DGM
2021-4-15
Are you trying to find elements that are common to all vectors? e.g. 2, in this case?
A=[1 2 3 7];
B=[2 2 4 6];
C=[1 3 2 5];
D=intersect(intersect(A,B),C)
There are probably other ways still.
Joel Schelander
2021-4-15
Something like this?
D=unique([intersect(A,B) intersect(A,C) intersect(B,C)])
and I guess if you wanted to mask off elements in a given vector that were in the set D, you could do that
Dmask=~ismember(A,D)
Jan
2021-4-15
The show code is not clear.
for i=1:length(A)
if intersect(A,B) || intersect(A,C) || intersect(B,C)
D(i)=0;
end
else % There is no IF for this ELSE ???
D(i)=1;
end
Neither the description in the original question, nor the code matchs the explanation given in the commen: "find elements that are common to at least two vectors"
Please case for asking clear question. The more confusing the question is, the more time you and the answering persons waste with not matching suggestions. You are not a beginner, but the code is for your master thesis.
采纳的回答
If this is the goal: "find elements that are common to at least two vectors":
A = [1 2 3 7];
B = [2 2 4 6];
C = [1 3 2 5];
V = unique([A, B, C]);
D = V((ismember(V, A) + ismember(V, B) + ismember(V, C)) >= 2)
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