R help - Jun 2004 - semi-continuous variables in lpSolve package

Hi,

     I am working with lpSolve "R" package by Sam Buttrey, buttrey at
nps.navy.mil ,
   which is interface to lp_solve linear/integer programming system.
   You can find information about lp_solve at
http://groups.yahoo.com/group/lp_solve/   (free registration required).

   lpSolve (R package) supports linear and integer programming but it does not
support semi-continuous variables
  and Special Ordered Sets (SOS) which are supported by lp_solve .
 
   I would like to know if there is a way to use semi-continuous variables in
lpSolve ?
   Does someone know how? 

   Best regards, 

   Igor  Yarmulnik   iyarmulnik at bear.com
   
 

 



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