Could anyone help me how to change the values of the matrix to a desired range.

Question

jaah navi 2021-6-19

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回答： Chunru 2021-6-19

N = 10

X = zeros(N)

X(1:2,:) = 1

If i run the code i am getting the result as

1 1 1 1 1 1 1 1 1 1

0 0 0 0 0 0 0 0 0 0

but I want to have the result as

1 1 1 1 1 1 1 1 1 1

0 0 2 2 2 2 2 2 2 2

0 0 0 0 3 3 3 3 3 3

0 0 0 0 0 0 5 5 5 5

0 0 0 0 0 0 0 0 6 6

0 0 0 0 0 0 0 0 0 7

0 0 0 0 0 0 0 0 0 9

Could anyone please help me on this

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Answer 1

Chunru 2021-6-19

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https://ww2.mathworks.cn/matlabcentral/answers/860135-could-anyone-help-me-how-to-change-the-values-of-the-matrix-to-a-desired-range#answer_728250

在 MATLAB Online 中打开

Something like this:

N = 10
N = 10
X = zeros(N);
X(1:2,:) = 1;
X(3:4, 3:end)=2;
X(5:6, 5:end)=3;
X(7, 7:end)=5;
X(8, 9:end)=6;
X(9, 10)=7;
X(10,10)=9;
X
X = 10×10
     1     1     1     1     1     1     1     1     1     1
     1     1     1     1     1     1     1     1     1     1
     0     0     2     2     2     2     2     2     2     2
     0     0     2     2     2     2     2     2     2     2
     0     0     0     0     3     3     3     3     3     3
     0     0     0     0     3     3     3     3     3     3
     0     0     0     0     0     0     5     5     5     5
     0     0     0     0     0     0     0     0     6     6
     0     0     0     0     0     0     0     0     0     7
     0     0     0     0     0     0     0     0     0     9