modifying an identity matrix

cgo
2022 8 9
1 个回答
回答已采纳
更新时间：2022 8 9
1 次查看（30 天）

0 个投票

I have an identity matrix. I want to put a '1' on the zeros that are right infront of the main diagonal, except at the very last '1'.
Is there an easy way to do it

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2022-8-9
Ran in:

0 个投票

Ran in:
I = eye(7)
I = 7×7
1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1
r = size(I,1);
newI = diag([ones(1,r-2), 0],-1) + I
newI = 7×7
1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Creating and Concatenating Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by