Creating triangular matrix from a vector (with a twist)

2015 9 7
1 个回答
回答已采纳
更新时间：2015 9 7
1 次查看（30 天）

0 个投票

I have a vector v=[a b c d] and I want to (efficiently) create a matrix of the form : M=[a 0 0 0 ; b a 0 0 ; c b a 0 ; d c b a ]. I am experimenting with "diag" function but it does not seem to be very efficient. Any thoughts?

请先登录，再回答此问题。

 采纳的回答

Matt J
Matt J 2015-9-7

0 个投票

>> toeplitz([1 2 3 4],[1,0,0,0])
ans =
1 0 0 0
2 1 0 0
3 2 1 0
4 3 2 1

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Matrix Indexing 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