n number of 2x2 matricies to diagonal matrix

4 次查看（过去 30 天）

k 2020-3-29

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/513774-n-number-of-2x2-matricies-to-diagonal-matrix

评论： k 2020-3-29

I have a 2x2 matrix that I need put into the diagonal of a matrix n times. In other words, on each diagonal, a new 2x2 matrix prints. For cells with two k values, they should be added together.

For example:

n = 3:

k -k 0 0

-k k+k -k 0

0 -k k+k -k

0 0 -k k

What I have:

n = input('Input the number of elements:');

k = ((E * avg_area)/L)*[+1 -1; -1 +1];

for n;

k_global = diag(k);

end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

David Hill 2020-3-29

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/513774-n-number-of-2x2-matricies-to-diagonal-matrix#answer_422691

在 MATLAB Online 中打开

n = input('Input the number of elements:');
k = ((E * avg_area)/L); 
k_global=diag([k,repmat(k+k,1,n-1),k])+diag(repmat(-k,1,n),-1)+diag(repmat(-k,1,n),1);