Replace part of matrix with other matrix.

B = [ 2,2,0,0,0,0;2,2,0,0,0,0;0,0,2,1,0,0;0,0,3,1,0,0;0,0,0,0,2,1;0,0,0,0,3,1]

i.e B is a matrix

2 2 0 0 0 0

2 2 0 0 0 0

0 0 2 1 0 0

0 0 3 1 0 0

0 0 0 0 2 1

0 0 0 0 3 1

and

A = [2,3;1,1]

A1 = [4,5;6,7]

A2 = [14,15;16,17]

A3 = [40,50;60,70]

I want to replaces zero submatrices with A,A1,A2,A3,A,A1 so that I can get the following matrix.....

B = 2 2 2 3 4 5

2 2 1 1 6 7

4 5 2 1 4 0 5 0

14 15 3 1 6 0 70

2 3 4 5 2 1

1 1 6 7 3 1

I tried to used B(B==0)=cat(3,A,A1,A2,A3,A,A1) command but didn't get right output.

Could you please tell how to replaces zero submatrices with A,A1,A2,A3,A,A1 so that I can get B matrix as mentioned above?

Thanks

Answer 1

[Matt J]

Z=zeros(2);

B=B+cell2mat({Z,A,A1;A2,Z,A3;A,A1,Z})

[parag gupta]

MJ You Are Great!!!

Thank you very much.

: )