What is the inversion method used in (inv) function in MATLAB

Question

Nurulhuda Ismail 2020-2-12

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/505121-what-is-the-inversion-method-used-in-inv-function-in-matlab

回答： Sindar 2020-2-12

Hi,

I use inv function in my code to solve a square matrix inversion and a lower triangular matrix inversion. May I know what is the inversion method used in MATLAB to solve this inversion?

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。

Answer 1

Sindar 2020-2-12

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/505121-what-is-the-inversion-method-used-in-inv-function-in-matlab#answer_415288

read the documentation:

"inv performs an LU decomposition of the input matrix (or an LDL decomposition if the input matrix is Hermitian). It then uses the results to form a linear system whose solution is the matrix inverse inv(X). For sparse inputs, inv(X) creates a sparse identity matrix and uses backslash, X\speye(size(X))."