Symmetric matrix element repositioning
1 visualizzazione (ultimi 30 giorni)
Mostra commenti meno recenti
Hi,
I have a symmetric matrix. I need to reposition the desired diagonal elements and their corresponding elements to the low/right side.
In the following code, the desired diagonal element is 7 and 8. Their diagonal element will be placed at the lower right side of the matrix, e.g.Y(7,7) will be placed at Ynew(8,8). As well as their relevant element, e.g. Y(1,7) will be placed at Ynew(1,8). Is there any way that I can do it more efficiently?
n=9;
%random symmetric matrix
Y=magic(n);
Y=(Y+Y')/2;
% Yrr
Yrr=[Y(7,7) Y(7,8);Y(8,7) Y(8,8)];
% Ytr
Ytr=[Y([1 2 3 4 5 6 9],7) Y([1 2 3 4 5 6 9],8)];
% Ytt
Ytt=[Y([1 2 3 4 5 6 9],[1 2 3 4 5 6 9])];
% Ytr
Yrt=Ytr.';
% new symmetric matrix
Ynew=[Ytt Ytr;Yrt Yrr];
Any advice would be much appreciated. Thanks for reading.
0 Commenti
Vedere anche
Categorie
Scopri di più su Operating on Diagonal Matrices in Help Center e File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!