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delete value from double class by using logical class

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ha ha
ha ha on 20 Mar 2018
Edited: ha ha on 20 Mar 2018
Let's say:
A : 2x7 double class
A=[ 1 2 3 4 5 6 7; 8 9 1 2 3 4 5] ;
A=[ 1 2 3 4 5 6 7
8 9 1 2 3 4 5 ]
B: 2x7 logical class:
B=boolean( [1 0 0 0 0 0 1;1 0 1 1 1 1 1] );
B={ 1 0 0 0 0 0 1
1 0 1 1 1 1 1 }
How to find the matrix C (double class)as follow result from A & B:
C=[ 1 7
8 1 2 3 4 5 ]
C=[1 7; 8 1 2 3 4 5] ????

Accepted Answer

Jan
Jan on 20 Mar 2018
Edited: Jan on 20 Mar 2018
As said already: Matrices must be rectangular. But you can use a cell array:
A = [ 1 2 3 4 5 6 7; ...
8 9 1 2 3 4 5];
B = logical([ 1 0 0 0 0 0 1; ...
1 0 1 1 1 1 1]);
n = size(A, 1);
C = cell(n, 1);
for k = 1:n
C{k} = A(k, B(k, :));
end
Then:
C = {[1 7]; ...
[8 1 2 3 4 5]}

More Answers (1)

Birdman
Birdman on 20 Mar 2018
Addition to Rik's comment, you should use cell array for this type of problems:
idx=A&~B;
C=mat2cell(A,ones(1,size(A,1)),ones(1,size(A,2)));
C(idx)={[]}

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