[R] Rsymphony

From: Kaveh Vakili <kaveh.vakili_at_ulb.ac.be>
Date: Tue, 08 Jun 2010 21:07:09 +0200

Hi list,

I have two question relating to the Rsymphony package:

  1. is there a way to use 'warm starts' ? i.e. if i successively call Rsymphony_solve_LP() with only one constraints change, does it perform the optimization from the simplex-origin or does it uses the previously found solution [i.e. as is common usage, see for instance lpsolveAPI]
  2. to what extend are sparse matrix supported ? i.e. if a constraint matrix is set as cbind(1,x,diag(dim(x)[1]),-diag(dim(x)[1])) is it understood as sparse ?


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