How to Copy and Paste a Small Matrix into a Bigger Matrix Without for-Loop
For Example, We Have a Small Matrix B = [5 2, 3 4] and the Bigger One a = [1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1] Now I Want Paste B into a So That...
For example, we have a small matrix
B = [5 2,
3 4]
and the bigger one
A = [1 0 0 0 0
0 1 0 0 0
0 0 1 0 0
0 0 0 1 0
0 0 0 0 1]
Now I want paste B into A so that A looks like
A = [1 0 0 0 0
0 1 0 0 0
0 0 1 0 0
0 0 0 5 2
0 0 0 3 4]
That means the values of A of the bottom right has been replaced. I would like to do this without using a for-loop. How is that possible?
PS:
- A is always an eye(n) matrix (n is a constant).
- B is a square matrix and has a variable size but is always less or equal to A
1 Answer
Find the relevant row and column subscripts of A and put B there.
A(end-size(B,1)+1:end, end-size(B,2)+1:end)=B
It works even if B is not a square matrix.
Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.
