glpkAPI (version 1.2.5)

getMatRowGLPK: 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.

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

Details

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

References

Based on the package glpk by Lopaka Lee. The GNU GLPK home page at http://www.gnu.org/software/glpk/glpk.html.