| writeMps {linprog} | R Documentation |
This function writes MPS files - the standard format for Linear Programming problems.
writeMps( file, cvec, bvec, Amat, name="LP" )
file |
a character string naming the file to write. |
cvec |
vector c. |
bvec |
vector b. |
Amat |
matrix A. |
name |
an optional name for the Linear Programming problem. |
The exported LP can be solved by running other software on this MPS file
(e.g. lp_solve, see ftp://ftp.es.ele.tue.nl/pub/lp_solve).
Arne Henningsen ahenningsen@agric-econ.uni-kiel.de
## example of Steinhauser, Langbehn and Peters (1992)
## Not run: library( linprog )
## Production activities
cvec <- c(1800, 600, 600) # gross margins
names(cvec) <- c("Milk","Bulls","Pigs")
## Constraints (quasi-fix factors)
bvec <- c(40, 90, 2500) # endowment
names(bvec) <- c("Land","Stable","Labor")
## Needs of Production activities
Amat <- rbind( c( 0.7, 0.35, 0 ),
c( 1.5, 1, 3 ),
c( 50, 12.5, 20 ) )
## Write to MPS file
writeMps( "steinh.mps", cvec, bvec, Amat, "Steinhauser" )