Help making a matrix table

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Ben Woods
Ben Woods 2022-12-9
移动：Image Analyst 2022-12-10
Could someone please help me make a matrix.
I need code that would make an NxN matrix with the pattern of:
if N=4
[1 1 1 1;
0 1 1 1;
0 0 1 1;
0 0 0 1]

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回答（2 个）

John D'Errico
John D'Errico 2022-12-9
Can you create a matrix of all ones?
Consider the function triu. Read the help. Look at the examples.
David
David 2022-12-9
移动：Image Analyst 2022-12-10
Ran in:
Hi! Got your back, i'm leaving a code that can do that.
Also, you can consider making a ones matrix with 'ones(N)', and getting the upper triangular with 'triu(M)'.
Hope you find this useful! <3
% With 'N' as the dimention of a square matrix.
M = zeros(N);
for i = 1 : N
for j = i : N
M(i,j) = 1;
end
end
M = 3×3
1 1 1 0 1 1 0 0 1

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