split a diagonal matrix

9 views (last 30 days)
Elysi Cochin
Elysi Cochin on 18 Mar 2019
Commented: Jos (10584) on 18 Mar 2019
v = [2 1 4];
D = diag(v)
Having a diagonal matrix, i wanted to split the diagonal matrix as below
M1 = [
2 0 0
0 0 0
0 0 0]
M2 = [
0 0 0
0 1 0
0 0 0]
M3 = [
0 0 0
0 0 0
0 0 4]
working for any dimension diagonal matrix
  1 Comment
Jos (10584)
Jos (10584) on 18 Mar 2019
What do you mean by "working for any dimension diagonal matrix" ?
Any number of elements in V? In that case, see my answer below.

Sign in to comment.

Accepted Answer

KSSV
KSSV on 18 Mar 2019
v = [2 1 4];
nx = length(v) ;
M = zeros(nx,nx,nx) ;
for i = 1:nx
M(i,i,i) = v(i) ;
end

More Answers (1)

Jos (10584)
Jos (10584) on 18 Mar 2019
Having a vector V with any number of elements, this does the job:
V = [2 1 4]
n = numel(V) ;
M = zeros(n,n,n) ;
M(linspace(1, n^3, n)) = V
If you have a diagonal matrix D, use V = diag(D) first.

Categories

Find more on Operating on Diagonal Matrices in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!