function opposite of ismember?

S
S
2012 8 8
1 个回答
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1 个投票

Hi, Is there a function that does the opposite of 'ismember' i.e. something like, 'isnotmember'?
So if:
A = [1:10]
B = [2,5,7]
ismember(A,B)
ans =
0 1 0 0 1 0 1 0 0 0
But instead, I want
isnotmember(A,B)
ans =
1 0 1 1 0 1 0 1 1 1

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Matt Fig
Matt Fig 2012-8-8
编辑：Matt Fig 2012-8-8

4 个投票

Use the logical negation symbol
~ismember(A,B)
or the functional form:
not(ismember(A,B))

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S
S 2012-8-8
Hi Matt, thanks for the quick reply.
The solution was easier than I thought...
Regardless, thanks! I really appreciate it.
Lalit Patil
Lalit Patil 2012-12-25
A = [1:10];
B = [2,5,7];
[flag,index] = ismember(B,A);
v = A(index(flag))
I tried and find that i am able to find flag and index of ismember(B,A) function.
But, i can not find for ~ismember(A,B) and not(ismember(A,B))
So, how to find it..?
Andrei Bobrov
Andrei Bobrov 2012-12-25
编辑：Andrei Bobrov 2012-12-25
flag = ~ismember(B,A);
index = find(flag);
or
[out,index] = setdiff(A,B);
Lalit Patil
Lalit Patil 2012-12-25
编辑：Lalit Patil 2012-12-25
It works by
flag = ~ismember(A,B);
index = find(flag);
Thank you.

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