matrix insert with a condition

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JK
JK il 17 Mag 2019
Commentato: Guillaume il 18 Mag 2019
can you help me insert m x n matrix into M x N matrix with a condition that is without zero.
starting location is (x,y)
M x N =
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
m x n =
0 2 2 0
2 2 2 2
0 2 2 0
(x,y) = (4,3)
M x N =
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 2 2 1 1 1 1
1 1 1 2 2 2 2 1 1 1
1 1 1 1 2 2 1 1 1 1

Risposta accettata

Guillaume
Guillaume il 17 Mag 2019
A = [1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1
1 1 1 1 1 1 1 1 1 1];
B = [0 2 2 0
2 2 2 2
0 2 2 0];
row = 3; col = 4;
toinsert = B + ~B .* A(row:row+size(B, 1)-1, col:col+size(B, 2)-1);
A(row:row+size(B, 1)-1, col:col+size(B, 2)-1) = toinsert
  2 Commenti
JK
JK il 17 Mag 2019
thanks for your feedback.
I am looking for a solution with a larger matrix which unfortunately i can't do all the individual calculations.
Guillaume
Guillaume il 18 Mag 2019
What individual calculations?
The code above is completely generic and will work for any size A and B and wherever any zeros are in B.
If it doesn't work for your generic case, then you need to explain a lot better what it is you want.

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