getMatRowGLPK {glpkAPI}

Retrieves Row i of the Constraint Matrix.

Description

Low level interface function to the GLPK function glp_get_mat_row. Consult the GLPK documentation for more detailed information.

Usage

  getMatRowGLPK(lp, i)

Arguments

lp

An object of class "glpkPtr" as returned by initProbGLPK. This is basically a pointer to a GLPK problem object.

i

Row number i.

Details

Interface to the C function getMatRow which calls the GLPK functions glp_get_num_cols and glp_get_mat_row.

Value

Returns NULL or a list containing the non zero elements of row i:

nnz

number of non zero elements in row i

index

column indices of the non zero elements in row i

value

numerical values of the non zero elements in row i

Author(s)

Gabriel Gelius-Dietrich <[e-mail]>

Maintainer: Mayo Roettger <[e-mail]>

References

Based on the package glpk by Lopaka Lee.

The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.