Sub-Matrices in a bigger matrix
3 Ansichten (letzte 30 Tage)
Ältere Kommentare anzeigen
Dear Users,
Imagine that I have 4 square matrices such as A11, B11, C11 and D22.
I want to insert them as diagonal elements of a bigger matrix (please see the pic on the attchments).
However, I don't know the size of the bigger matrix. I will find it out when I insert all sub-matrices. Is there any easy way to do it?
Thanks in advance!
0 Kommentare
Akzeptierte Antwort
madhan ravi
am 19 Jul. 2019
blkdiag(A11, B11, C11, D22)
2 Kommentare
madhan ravi
am 19 Jul. 2019
m = size(A11,1);
Wanted = blkdiag(A11, B11, C22, D22);
Wanted(1:m,m+1:end) = [A12,A13,A14];
Wanted(m+1:m*2,1:m) = B21
Weitere Antworten (1)
Andrei Bobrov
am 19 Jul. 2019
For matrices with the same size. Let [m,n] - size of each matrix, q - number of matrices in the vertical of a large matrix:
M = cat(3,A11,B21,..,A12,B11,..,A13,..,C11,..D22);% A11, B21 and etc - your small matrices
out = reshape(permute(reshape(M,m,n,q,[]),[1,3,2,4]),q*m,[]);
0 Kommentare
Siehe auch
Kategorien
Mehr zu Matrix Indexing finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!