could you please convert it into a loop

very simple logic but im not getting

n=4
K = [ 1,  2; 3, 4]
 
K1=zeros(n+1);
K1([1 2],[1 2])=K
K2=zeros(n+1);
K2([2 3],[2 3])=K
K3=zeros(n+1);
K3([3 4],[3 4])=K
K4=zeros(n+1);
K4([4 5],[4 5])=K

L=K1+K2+K3+K4;

how to convert this into loop where we can add more Kn matrices

[Stephen23]

"how to convert this into loop where we can add more Kn matrices"

Do NOT do that. Dynamically accessing variable names is one way that beginners force themselves into writing slow, complex, buggy code that is hard to debug. Read this to know why:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Indexing is neat, simple, and very efficient. You should use indexing, e.g. with a cell array or an ND numeric array.

[page vnky]

thanks stephen!! that gave me lot and i got it.

Answer 1

[Guillaume]

In addition to what Stephen said, it's very easy to create your L for any n, without even a loop:

K = [1 2; 3 4];
n = 5;

L = toeplitz([trace(K), K(2, 1), zeros(1, n-2)], [trace(K), K(1, 2), zeros(1, n-2)]);
L([1, end]) = K([1, end])

[page vnky]

wow guillaume, i got one step answer with yours... thanks a lot