Indexing a cell using a table

A is 90x90 cell and each cell of A includes a 100x1 double. B is 90x90 logical with ones being the cells that I want to retrieve from A.

My goal is to create a 90x90 cell, namely C, containing the context of the cells of A (100x1 double) if the corresponding index in B is 1 and containing [] (0x0 double) if the coressponding index in B is 0. The code C=A(B) returns a cell array, but this is not what I ask for.

Simplified example:

A is a 3x3 cell with cell containing a 3x1 double

A = {[1;2;3] [4;5;6] [7;8;9] ; [10;11;12] [13;14;15] [16;17;18] ; [19;20;21] [22;23;24] [25;26;27]}

B is a 3x3 double with ones being the cells that I want to retrieve

B = [1 0 0;1 0 1; 1 1 1]

C is the 3x3 cell that I want to create

C = {[1;2;3] [] [] ; [10;11;12] [] [16;17;18] ; [19;20;21] [22;23;24] [25;26;27]}

OR

C = {[1;2;3] [22;23;24] [16;17;18] ; [10;11;12] [] [25;26;27] ; [19;20;21] [] []}

Answer 1

[Karim]

i gues you need to translate the logical matrix B into indexes, e.g. using find

% create A
A = {[1;2;3] [4;5;6] [7;8;9] ; [10;11;12] [13;14;15] [16;17;18] ; [19;20;21] [22;23;24] [25;26;27]};
% create the logical indexes
B = [1 0 0;1 0 1; 1 1 1];
% now create C
C = cell(size(A));
C( find(B) ) = A( find(B) );
C

C = 3×3 cell array
    {3×1 double}    {0×0 double}    {0×0 double}
    {3×1 double}    {0×0 double}    {3×1 double}
    {3×1 double}    {3×1 double}    {3×1 double}

C{1}

ans = 3×1

1 2 3

C{2}

ans = 3×1

10 11 12

C{4}

ans =

     []

% check some values...
C_test = {[1;2;3] [] [] ; [10;11;12] [] [16;17;18] ; [19;20;21] [22;23;24] [25;26;27]}

C_test = 3×3 cell array
    {3×1 double}    {0×0 double}    {0×0 double}
    {3×1 double}    {0×0 double}    {3×1 double}
    {3×1 double}    {3×1 double}    {3×1 double}

[Eric Sofen]

There is no need to use find. Use logical indexing:

% create A
A = {[1;2;3] [4;5;6] [7;8;9] ; [10;11;12] [13;14;15] [16;17;18] ; [19;20;21] [22;23;24] [25;26;27]};
% create the logical indexes
B = logical([1 0 0;1 0 1; 1 1 1]);
% now create C
C = cell(size(A));
C(B) = A(B)

C = 3×3 cell array
    {3×1 double}    {0×0 double}    {0×0 double}
    {3×1 double}    {0×0 double}    {3×1 double}
    {3×1 double}    {3×1 double}    {3×1 double}