Usage of the commande nnls(A,b,tol) in MATLAB new versions

Question

Poulmdé 2024-6-10

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2127006-usage-of-the-commande-nnls-a-b-tol-in-matlab-new-versions

评论： Poulmdé 2024-6-13

Hello,

I want to solve the following non negative least squares problem : nnls(A,b,tol). Given a matrix A, a vector b and a tolerance tol, I want to fin x such ||A*x-b||^2 < tol* ||b||^2 with x>=0

Does someone have any idea how to do it in matlab ?

Regards !

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

Animesh 2024-6-10

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2127006-usage-of-the-commande-nnls-a-b-tol-in-matlab-new-versions#answer_1469521

Hi @Poulmdé,

In MATLAB, you can solve a non-negative least squares (NNLS) problem using the 'lsqnonneg' function.

To read more about it, please refer to the following link - https://www.mathworks.com/help/matlab/ref/lsqnonneg.html

2 个评论
显示无隐藏无

Poulmdé 2024-6-10

Thank you for your answer @Animesh

But I don't know how to use this 'lsqnonneg' with a tolerance imposed. Actually, I am not looking for the solution that minimizes the residual norm but the first one such that the residual fullfils the tolerance.

Thanks !

Poulmdé 2024-6-13