XPRBsetvardir
XPRBsetvardir |
Purpose
Synopsis
int XPRBsetvardir(XPRBvar var, int type, double c);
Arguments
|
var
|
BCL reference to a variable.
|
||||||||||
|
type
|
Directive type, which must be one of:
|
||||||||||
|
c
|
An argument dependent on the type of directive to be defined. Must be one of:
|
Return value
0 if function executed successfully, 1 otherwise.
Example
The following example gives a priority of
10 to variable
x1 and sets the preferred branching direction to be upwards.
XPRBprob prob; XPRBvar x1; ... x1 = XPRBnewvar(prob, XPRB_UI, "abc3", 0, 100); XPRBsetvardir(x1, XPRB_PR, 10); XPRBsetvardir(x1, XPRB_UP, 0);
Further information
1. This function sets any type of branching directive available in Xpress. This may be a priority for branching on a variable (type
XPRB_PR), the preferred branching direction (types
XPRB_UP,
XPRB_DN) or the estimated cost incurred when branching on a variable (types
XPRB_PU,
XPRB_PD). Several directives of different types may be set for a single variable.
2. Note that it is only possibly to set branching directives for discrete variables (including semi-continuous and partial integer variables). Function
XPRBsetsosdir may be used to set a directive for a SOS.
Related topics