[Coin-discuss] setColSolution

[Lou Hafer]

	Brady writes, in regard to set[Col,Row]Solution for glpk,
	
  One option is to "set" the values that are cached, but not tell GLPK
  about them at all.

	For what it's worth, this is the approach I'm taking with dylp, with
a warning in the documentation that dylp will take no notice of these
values.  This seems to match the approach in clp (as best I can figure; fun
to read but John has too much time on his hands, or maybe too many years of
practice :-).

	It really seems to me that the utility of these two methods is to
allow the user to establish useful values for the solutions and objective
prior to calling the solver. If you really want to force a solution on dylp,
the proper approach is to give it a basis and a status vector (likely true
for most simplex solvers).  My impression is that this is handled through the
OsiSimplex interface, but I haven't quite gotten there yet.

	This is one of the ambiguities that prompted me to suggest that we
need to work up some underlying principles for our interface layers.

						Lou