[
https://issues.apache.org/jira/browse/MATH-246?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12689389#action_12689389
]
Luc Maisonobe commented on MATH-246:
------------------------------------
Another issue that bothers me.
There is a constructor for a linear constraint with vectors for both left hand
side and right hand side that subtracts both and put 0 as the scalar on the
right hand side.
This seems odd to me.
If for example we call it with lhs = { 2, 3 }, rhs = { 1, 1 }, r = EQ this
means we set up the constraint
(2 - 1) x + (3 - 1)y = 0 or x + 2y = 0. Users may think it would be equivalent
to the two constraints 2x=1 and 3y=1 which is not the case. For inequality
constraints, this looks even more strange.
If there is a use for this in a specific context, I suggest the subtraction be
done at user code level before calling the constructor rather than providing
support in the linear constraint class for this.
I suggest to drop this constructor, except if you can provide me some hints I
will pour in the javadoc to help users.
> Simplex Method Implementation
> -----------------------------
>
> Key: MATH-246
> URL: https://issues.apache.org/jira/browse/MATH-246
> Project: Commons Math
> Issue Type: New Feature
> Reporter: Benjamin McCann
> Assignee: Luc Maisonobe
> Fix For: 2.0
>
> Attachments: newfiles.zip
>
>
> I've created an implementation of the Simplex algorithm for optimizing
> systems of constrained linear equations that I'd like to contribute.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
