[Coin-discuss] Making changes to coefficients in existing rows in OSI

[Thorncraft, Stuart]

Hi

 

I've been using the OSI CLP interface to construct and solve the same
optimisation problem repeatedly but with different row bounds, column
bounds and decision-variable coefficients.  I'd like to be able to do
this by making only minor changes to the existing optimisation rather
than regenerate the problem completely from scratch.

 

I note that the "setColBounds" and "setRowBounds" methods can be used
for changing the bounds on existing columns or rows but could not find a
similar method that can be called to change decision variable
coefficients. 

 

So my question is what is the best way to make changes to
decision-variable coefficients using OSI?  E.g. does a method exist to
do this or is it necessary to delete the relevant row(s) and recreate
them?

 

Apologies if I've missed something in the OSI interface.

 

Thanks

Stuart

 


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