MATLAB: How to produce a logical matrix using index matrix

matrix

Hi, i need some help here, im also new in matlab. i have 'b' containing index matrix for example b=1; i want to create logical matrix and should be [1 0 0 0]

if i have b = 2, the matrix will be [0 1 0 0]. Hope i find some solutions. TQIA

Best Answer

Try

logical_matrix = false( 1, 4 );
logical_matrix( b ) = true;

Related Solutions

MATLAB: Problem with Matrix indexing using vector

This is a job for sub2ind:

a        = blkdiag(ones(3),ones(3));
[r,c]    = find(a);
b        = zeros(size(a));
index    = sub2ind(size(a), r, c);
b(index) = 1;
isequal(a, b)  % TRUE

Maybe using logical indexing is more efficient than find():

mask    = (a == 1);
b       = zeros(size(a));
b(mask) = 1;

MATLAB: Transform column and row data of logical matrix to vector(N X 2)

logical_matrix = [0  0  0  0; 0  1  0  0; 0  0  0  0; 0  0  1  0; 0  1  0  1];
[i,j] = find(logical_matrix);
vector_matrix = [i,j]
% vector_matrix =
% 
%      2     2
%      5     2
%      4     3
%      5     4

Best Answer

Related Solutions

MATLAB: Problem with Matrix indexing using vector

MATLAB: Transform column and row data of logical matrix to vector(N X 2)

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