Read LP

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Description

Read an lpSolve linear program model object from a file.

Usage

1
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read.lp(filename, type = c("lp", "mps", "freemps"), verbose = "neutral", 
        options)

Arguments

filename

a character string giving the name of the file which the linear programming model is to be read from.

type

the type of file provided in filename. If missing, read.lp will attempt to guess the file type by examining the file's suffix.

verbose

a character string controlling the level of error reporting. The default value "neutral" is no error reporting. Set to "normal" to enable error reporting or to "full" for a comprehensive parse log. See the verbose entry in lp.control.options for a complete description of this argument and its possible values.

options

a character vector of options for the (free)mps parser. Possible values are

free

Use the free MPS format even when type = "mps". If not specified, the fixed MPS format is used. This option has no effect when type = "freemps" but will not result in an error or a warning.

ibm

Interpret integer variables without bounds as binary variables per the original IBM standard. By default, lp_solve interprets integer variables without bounds as having no upper bound.

negobjconst

Interpret the objective constant with an opposite sign. Some solvers interpret the objective constant as a value in the RHS and negate it when brought to the LHS. This option allows lp_solve to do this as well.

Value

an lpSolve linear program model object.

Author(s)

Kjell Konis kjell.konis@me.com

References

http://lpsolve.sourceforge.net/5.5/index.htm

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