MATLAB: Create a Matrix with a specific main diagonal

for looploopmatrix

I want to create a matrix of all one's with the main diagonal of value n.

Best Answer

 val = 50; N = 10; 
 X = diag(repmat(val-1, 1, 10)) + ones(N)

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MATLAB: How to Assemble the matrix shown in the image on Matlab for any number of nodes

n = 4;    %for example
main_diagonal = [ [-4, repmat(-3,1,n-2), -4], repmat([-5, repmat(-4,1,n-2), -5], 1, 2), [-6, repmat(-5,1,n-2), -6] ];
N = length(main_diagonal);
m = diag(ones(1, N-4), -4) +
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    diag(main_diagonal) +
    diag(ones(1, N-1), 1) +
    diag(ones(1, N-4), -4)

MATLAB: Create main diagonal with repeated numbers but one exception

solution:

n=5;
M=diag([0 ones(1,n-1)])+ones(n)

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