清空筛选条件
清空筛选条件

malipulating matrices...Cramers Rule help

1 次查看（过去 30 天）
Nicholas
Nicholas 2013-9-24
i have a matrix A = [1 3 -8;4 -5 19]
and i have b = A(:,3), which gives b = [-8;19]
for cramers rule i now need to replace the 1st column of A with the column matrix b and only give me a 2x2 matrix disregarding the 3rd column, my result needs to be...
A = [-8 3;19 -5] how do i do this???

请先登录，再回答此问题。

回答（1 个）

Azzi Abdelmalek
Azzi Abdelmalek 2013-9-24
编辑：Azzi Abdelmalek 2013-9-24
A = [1 3 -8;4 -5 19]
B=fliplr(A(:,2:3))
  2 个评论
Nicholas
Nicholas 2013-9-24
thanks...do i use the same function to input b in the 2nd column?
Azzi Abdelmalek
Azzi Abdelmalek 2013-9-24
You can just change the order like below
A(:,[3 2]) % b in first column
A(:,[1 3]) % b in second column

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Linear Algebra 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