Matrix Maniplation: Removing a smaller matix from a larger matrix.

Hi,

Say I have 2 matrices:

a=[1 2 3 4; 5 6 7 8; 9 10 11 12; 13 14 15 16];
b=[6 7; 10 11];

How could I remove b from a to create c. In the same way if a was a 36x3 matrix and b was a 16x3 matrix of any numbers I could remove the values of b from a to create c (20x3 matrix).

Thanks

[Guillaume]

What does remove mean? What is the c you're hoping to obtain?

c = [1    2    3    4
     5    ?    ?    8
     9    ?    ?   12
    13   14   15   16]

[Jack]

Yes, is there anyway of doing this?

as in if I have a matrix 36x3 say and a matrix of 16x3 this 16x3 matrix is inside the 36x3 matrix. How do I remove it to obtain a 20x3 matrix?

Thanks.

[Guillaume]

Yes to what? Note that I've put some questions mark in my c since I've no idea what you want.

I have no idea what sort of 20x3 matrix you're hoping to get. If you remove a square from a bigger square, you're left with a square with a hole, not a smaller square.

Answer 1

[Guillaume]

See this file exchange submission for finding your b within your a.

I have no idea what sort of c you're trying to obtain.