|
From: | Philippe Jugla |
Subject: | Constraint on a binary variable |
Date: | Wed, 30 Jun 2021 15:24:18 +0000 |
Hi everyone,
In my model, I have a variable "p" which has an upper bound pmax := 2.5 and a lower bound pmin := -2.5.
I would simply like to add a binary variable "sign" which takes the values :
1 if variable p is positive
0 if variable p is negative (or vice-versa)
I thought of something like :
s.t c1 : sign >= p[t] / pmax;
So if p[t] is positive : sign >0 and <1, therefore sign will be forced to 1.
However, if p[t] is negative, "sign" is greater than a negative value so the variable is no longer constrained, and can take values 0 or 1.
How can I work things out ?
Thanks for your help
Best regards,
Philippe
|
[Prev in Thread] | Current Thread | [Next in Thread] |