#16714: Add a matrix of constraints in a LP
-------------------------------------+-------------------------------------
Reporter: ncohen | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.4
Component: linear | Resolution:
programming | Merged in:
Keywords: | Reviewers:
Authors: | Work issues:
Report Upstream: N/A | Commit:
Branch: | fd10630a8e4884d3a44f55cc6e1d4c83ea7ee154
u/vbraun/add_a_matrix_of_constraints_in_a_lp| Stopgaps:
Dependencies: |
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Comment (by ncohen):
> I'm not trying to give you orders, I just want to know whether
`add_linear_constraints` is supposed to work, and if not how you'd
envision it to work. Create empty rows and then mutate later? Or is the
constraint data just missing from the argspec? or what?
I guess that it is meant to allocate space for new rows, before changing
the coefficient. As I said above I implemented this function only to
expose those that are available in the solvers, and they do the very same
thing (if not less).
GLPK: takes only a number of rows as an argument. Nothing else
{{{
glp_add_rows(self.lp, number)
}}}
Cplex: takes a number of rows and the corresponding upper/lower bound.
Plus names
{{{
CPXnewrows(self.env, self.lp, number, bound, sense, rng, c_names if names
else NULL) #
}}}
Looks like the others don't have this function implemented.
Nathann
--
Ticket URL: <http://trac.sagemath.org/ticket/16714#comment:32>
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