CPXNETcopybase

The routine CPXNETcopybase can be used to set the network basis for a network problem object. It is not necessary to load a basis prior to optimizing a problem, but a very good starting basis may increase the speed of optimization significantly. A copied basis does not need to be feasible to be used by the network optimizer.

Any solution information stored in the problem object is lost.

Example

 status = CPXNETcopybase (env, net, arc_stat, node_stat);

Table 1: Status of arcs in astat
`CPX_BASIC`	if the arc is to be basic
`CPX_AT_LOWER`	if the arc is to be nonbasic and its flow is on the lower bound
`CPX_AT_UPPER`	if the arc is to be nonbasic and its flow is on the upper bound
`CPX_FREE_SUPER`	if the arc is to be nonbasic but is free. In this case its flow is set to 0

Table 2: Status of artificial arcs in nstat
`CPX_BASIC`	if the arc is to be basic
`CPX_AT_LOWER`	if the arc is to be nonbasic and its flow is set to 0

CPXNETcopybase

Parameters:

Returns:

env	A pointer to the CPLEX environment as returned by `CPXopenCPLEX`.
net	A pointer to a CPLEX network problem object as returned by `CPXNETcreateprob`.
astat	Array of status values for network arcs. Each arc needs to be assigned one of the values in Table 1.
nstat	Array of status values for artificial arcs from each node to the root node. Each artificial arc needs to be assigned one of the values in Table 2. At least one of the artificial arcs must be assigned the status `CPX_BASIC` for a network basis.