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CPLEX API - missing routines

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	CPLEX API - missing routines by Chris Alford :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Some parts of this message have been removed. Learn more about Nabble's security policy. Hi, I want to use the CPLEX API interface code supplied with the distribution to link an existing application with GLPK. The notes supplied indicate that the API roughly matches CPLEX 9.0. Going through the list of unresolved external symbols, I have identified a small number of routines that are not currently available in the API. The routine of greatest concern is CPXchgcoeflist. From the GLPK manual the only routine I can find to load up coefficients is glp_load_matrix, which assumes all coefficients are supplied in one call. Has anyone else found a workaround to implement CPXchgcoeflist? My existing application relies heavily on CPXchgcoeflist to incrementally build up the matrix, and would prefer to not have to rework the original application. Thanks for your assistance. Chris _______________________________________________ Help-glpk mailing list Help-glpk@... http://lists.gnu.org/mailman/listinfo/help-glpk
	Re: CPLEX API - missing routines by xypron :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message Hello Chris, the documentation in file doc/glpk.pdf of the source distribution available at ftp://ftp.gnu.org/gnu/glpk/glpk-4.30.tar.gz. To update existing coefficients you can use the following routines: glp set mat row—set (replace) row of the constraint matrix glp set mat col—set (replace) column of the constraint matrix To incrementally build the matrix you can use glp add rows—add new rows to problem object glp add cols—add new columns to problem object Currently a function like CPXchgcoeflist does not exist in GLPK. The description can be found at: http://www.uni-koeln.de/rrzk/software/fachuebergreifend/or/cplex_doku/refcallablelibrary/html/functions/CPXchgcoeflist.html To change a coefficient in GLPK you first have to read the row, column, or matrix and then replace it. Best regards Xypron Chris Alford wrote: Hi, I want to use the CPLEX API interface code supplied with the distribution to link an existing application with GLPK. The notes supplied indicate that the API roughly matches CPLEX 9.0. Going through the list of unresolved external symbols, I have identified a small number of routines that are not currently available in the API. The routine of greatest concern is CPXchgcoeflist. From the GLPK manual the only routine I can find to load up coefficients is glp_load_matrix, which assumes all coefficients are supplied in one call. Has anyone else found a workaround to implement CPXchgcoeflist? My existing application relies heavily on CPXchgcoeflist to incrementally build up the matrix, and would prefer to not have to rework the original application. Thanks for your assistance. Chris _______________________________________________ Help-glpk mailing list Help-glpk@gnu.org http://lists.gnu.org/mailman/listinfo/help-glpk
	Re: CPLEX API - missing routines by Andrew Makhorin :: Rate this Message: Reply to Author \| View Threaded \| Show Only this Message > Going through the list of unresolved external symbols, I have > identified a small number of routines that are not currently available > in the API. Please note that some routines are present but not implemented, for example, CPXbinvrow. > The routine of greatest concern is CPXchgcoeflist. From the GLPK > manual the only routine I can find to load up coefficients is > glp_load_matrix, which assumes all coefficients are supplied in one > call. > Has anyone else found a workaround to implement CPXchgcoeflist? My > existing application relies heavily on CPXchgcoeflist to incrementally > build up the matrix, and would prefer to not have to rework the > original application. I can implement this routine. Andrew Makhorin _______________________________________________ Help-glpk mailing list Help-glpk@... http://lists.gnu.org/mailman/listinfo/help-glpk