Find a submatrix in a matrix

Hi,

I am trying to find the colums and rows in a large matrix that contain the submatrix.

Say we have

T = [0,3,0,0,0,0;3,0,4,0,8,0;0,4,0,1,0,0;0,0,1,0,0,0;0,8,0,0,0,6;0,0,0,0,6,0]
0    3    0    0    0    0
3    0    4    0    8    0
0    4    0    1    0    0
0    0    1    0    0    0
0    8    0    0    0    6
0    0    0    0    6    0

and we have a submatrix of

S = [0,3,0,0;3,0,4,0;0,4,0,1;0,0,1,0]
0     3     0     0
3     0     4     0
0     4     0     1
0     0     1     0

how can we find the rows and columns in T that contain submatrix S please?

TIA

Answer 1

[KSSV]

https://in.mathworks.com/matlabcentral/answers/395258-most-efficent-way-of-finding-submatrices-of-a-matrix

https://in.mathworks.com/matlabcentral/answers/286890-how-do-i-find-the-submatrix-of-a-matrix

[han]

Hi,

I changed S and T to be A and B

I am new to MATLAB so sorry if I am missing something here

In the second link i used the below:

szA = size(A) ;
szB = size(B) ;
szS = szA - szB + 1 
tf = false(szA) ;
for r = 1:szS(1)
    for c = 1:szS(2)
        tf(r,c) = isequal(A(r:r+szB(1)-1,c:c+szB(2)-1),B)
    end
end
[rout,cout] = find(tf)

Rout was equal to 1 and cout was equal to 1,

I need to find the columns in the large matrix that contain the sub matrix

Thank you

[darova]

rout and cout are indices of A matrix, where A=B

[han]

ahh i see, thank you!