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getrange

Purpose
Get a range value for a variable or constraint.
Synopsis
function getrange(w:integer, x:mpvar):real
function getrange(w:integer, c:linctr):real
Arguments
w 
Which information to return. Possible values for a variable:
XPRS_UPACT 
For a variable which is at one of its bounds, the largest value which that bound can take while the current basis remains optimal
XPRS_LOACT 
For a variable which is at one of its bounds, the smallest value which that bound can take while the current basis remains optimal
XPRS_UUP 
The change in objective value per unit increase in the variable activity, assuming the the current basis remains optimal
XPRS_UDN 
The change in objective value per unit decrease in the variable activity, assuming the the current basis remains optimal
XPRS_UCOST 
The largest value which this variable's objective coefficient can take while the current basis remains optimal
XPRS_LCOST 
The smallest value which this variable's objective coefficient can take while the current basis remains optimal
Possible values for a constraint:
XPRS_UPACT 
The largest value which the constraint RHS can take while the current basis remains optimal
XPRS_LOACT 
The smallest value which the constraint RHS can take while the current basis remains optimal
XPRS_UUP 
The change in objective value per unit increase in the constraint RHS, assuming the the current basis remains optimal
XPRS_UDN 
The change in objective value per unit decrease in the constraint RHS, assuming the the current basis remains optimal
x 
A variable of the problem
c 
A constraint of the problem
Return value
Range information depending on the value of w.
Further information
This function returns ranging information to be used for sensitivity analysis after the problem has been optimized. On MIP problems, global entities have to be ``fixed'' using the procedure fixglobal before this function can be called.
Related topics
fixglobal.
Module
mmxprs

Parent Topic Procedures and functions

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