MATLAB: Vector element extraction

compare

>> S=[8 4 1 6 7 2 1 5 0 5 1];
>> C=[1 0 5 8];

I want to remove all the elements in S which are in C. In otherwords, I want to extract all the elements in S which are already in C.

i.e.,

My output have to look like

>>ans= [4 6 7 2]

Best Answer

Hi,

try setdiff:

 setdiff(S,C)

Related Solutions

MATLAB: Divide an array in n different arrays

V = [1 1 1 1 1 1 6 6 6 6 6 6 6 6 6 3 3 3 3 3 3 3 5 5 5 5 5 5 5 8 8 8 8 8 8 8 8 8 9 9 9 9 9 9 9 9 9 4 4 4 4 4 4 4 4 4 4 2 2 2 2 2 1 1 1 1 1 6 6 6 6 6 6 6]
A = [1 3 4
6 5 2
0 8 0
0 9 0]
[~,c,a] = find(A);
[~,i] = ismember(V,a);
g = c(i);
d = find([true; diff(g); true]);
c = mat2cell(V,1,diff(d));
c{:}

MATLAB: 3d matrix element extraction

[~,~,p]=size(m);              % array depth for generality
ix=sub2ind(size(m),repmat(a,1,p),repmat(b,1,p),repmat(1:p,1,length(a)));  % doc sub2ind for details
subm=m(ix);

reshape and/or reorder as desired; above will be vector of length p*length(a) in order as in the list of subscript vectors.

ADDENDUM

If you preallocate, I'd expect a loop to not be terribly slow, either.

Best Answer

Related Solutions

MATLAB: Divide an array in n different arrays

MATLAB: 3d matrix element extraction

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