get.column {lpSolveAPI} | R Documentation |
Retrieve a column from an lpSolve linear program model object.
get.column(lprec, column)
lprec |
an lpSolve linear program model object. |
column |
a single numeric value from the set {1, ..., n} (where n is the number of decision variables in lprec ) specifying which column to retrieve. |
a list with elements column
and nzrow
such that column[i]
contains the constraint coefficient in row nzrow[i]
. Rows not present in nzrow
have coefficient zero in column
.
Kjell Konis kjell.konis@epfl.ch
http://lpsolve.sourceforge.net/5.5/index.htm
lps.model <- make.lp(4, 0) x <- c(6,2,4,9) add.column(lps.model, x) y <- c(3,1,5) ind <- c(1,2,4) add.column(lps.model, y, ind) get.column(lps.model, 2)