# Linear Least Squares With 2 Inequality Constraints

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Royi Avital on 20 Aug 2015
Commented: John D'Errico on 20 Aug 2015
Hello,
I would like to know how can I solve the following Linear Least Squares problem:
arg min(x) (Ax - b)'(Ax - b)
s.t.
Ax >= c
Ax <= d
Is there a way to it in MATLAB?
The Constrained Linear Least Squares in MATLAB only allows one inequality.
Thank You.
John D'Errico on 20 Aug 2015
It simply is not true that lsqlin only allows one constraint. READ THE HELP.

Royi Avital on 20 Aug 2015
I created a solution.
It can be found here:

Torsten on 20 Aug 2015
help lsqlin
Best wishes
Torsten.
##### 3 CommentsShow 1 older commentHide 1 older comment
Torsten on 20 Aug 2015
[-A ; A]*x <= [-c ; d]
So choose the matrix in lsqlin as [-A ; A] and the right-hand side vector as [-c ; d].
Best wishes
Torsten.
Royi Avital on 20 Aug 2015
This is exactly what I did. But I will mark your question.
Thank You.

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