readProb-methods: Read Problem Object From File

In sybil: Efficient Constrained Based Modelling

Description

Read problem object from file.

Usage

## S4 method for signature 'optObj_clpAPI,character'
readProb(lp, fname, ff = "mps", ...)

## S4 method for signature 'optObj_cplexAPI,character'
readProb(lp, fname, ff = "lp")

## S4 method for signature 'optObj_glpkAPI,character'
readProb(lp, fname, ff = "lp", ...)

## S4 method for signature 'optObj_lpSolveAPI,character'
readProb(lp, fname, ff = "lp", ...)

Arguments

lp	An object extending class optObj.
fname	A single character string giving the file name to read from.
ff	A single character string giving the file format to use, see Details. Default: "lp".
...	Further arguments passed to the corresponding API routine.

Details

Argument "ff" in conjunction with clpAPI can be mps for MPS file format or "clp" for COIN-OR Clp file mormat. Valid values for cplexAPI and lpSolveAPI are available in their documentations. For glpkAPI, argument "ff" can be "lp" for LP file format, "mps" for MPS file format or "glpk" for GLPK file format.

Methods

signature(lp = "optObj_clpAPI", fname = "character")

method to use with package optObj_clpAPI. Argument ff is not used here.

signature(lp = "optObj_cplexAPI", fname = "character")

method to use with package optObj_cplexAPI.

signature(lp = "optObj_glpkAPI", fname = "character")

method to use with package optObj_glpkAPI.

signature(lp = "optObj_lpSolveAPI", fname = "character")

method to use with package optObj_lpSolveAPI.

Author(s)

Gabriel Gelius-Dietrich <[e-mail]>

Maintainer: Mayo Roettger <[e-mail]>

See Also

Superclass optObj and constructor function optObj. Method to write problem objects: writeProb

Examples

	## Not run: 
		# In very rare cases it is handy to save a sysBiolAlg-object:

		library(sybil)
		data(Ec_core)
		
		# create a sysBiolAlg object (we use here GLPK (!))
		prob <- sysBiolAlg(Ec_core, algorithm = "fba", solver="glpkAPI")
		
		# write the R-object to disc
		save(file="prob.RData",prob)
		
		# now write the linear program part (managed by the solver) to disc
		writeProb(prob@problem, fname="prob.lp", ff="lp")

		# start new R session

		library(sybil)
		library(glpkAPI)
		load("prob.RData") # restore the R-object
		prob@problem@oobj <- initProbGLPK() # initialize a new linear program
		readProb(problem(prob), fname="prob.lp") # load the previously saved linear program
	
## End(Not run)

sybil documentation built on May 31, 2021, 5:08 p.m.