On Saturday, 25 April 2015 10:26:48 UTC+1, vdelecroix wrote:
>
> Hello,
>
> I have COIN-OR installed on my computer and hence MILP chooses it as a
> default:
> {{{
> sage: default_mip_solver()
> 'Coin'
> }}}
> (it would have been GLPK otherwise)
>
> It is annoying since as a consequence the following fails:
> **********************************************************************
> File "src/doc/en/thematic_tutorials/linear_programming.rst", line 432,
> in doc.en.thematic_tutorials.linear_programming
> Failed example:
> p.solve() # rel tol 2e-12
> Expected:
> 2.0
> Got:
> 2.0000000000040004
> Tolerance exceeded:
> 2.0 vs 2.0000000000040004, tolerance 2e-12 > 2e-12
> **********************************************************************
>
> In particular, all MILP related doctests are highly dependent on the
> machine installation!
>
I would advocate the approach that all the MILP tests are explicit about
the solver to be
used. Indeed, it's not only COIN, but all the other solvers like CPLEX
behave this way.
Nathann, would you mind this?
Dima
>
> Vincent
>
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