getMatRowGLPK: Retrieves Row i of the Constraint Matrix.

In glpkAPI: R Interface to C API of GLPK

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.

glpkAPI documentation built on Nov. 10, 2022, 5:51 p.m.