Initializing help system before first use

SCALING

Description
This determines how the Optimizer will rescale a model internally before optimization. If set to 0, no scaling will take place.
Type
Integer
Values
Bit
Meaning
0 
Row scaling.
1 
Column scaling.
2 
Row scaling again.
3 
Maximum.
4 
Curtis-Reid.
5 
0: scale by geometric mean.
1: scale by maximum element.
6 
Treat big-M rows as normal rows.
7 
Objective function scaling.
8 
Exclude the quadratic part of constraint when calculating scaling factors.
9 
Scale before presolve.
10 
Do not scale rows up.
11 
Do not scale columns down.
13 
RHS scaling.
14 
Disable aggressive quadratic scaling.
15 
Enable explicit linear slack scaling.
Default value
163
Note
Setting SCALING to 0 will preserve the current scaling of the problem.
Affects routines
XPRSlpoptimize, XPRSlpoptimize, XPRSmipoptimize, XPRSscale ( SCALE).
See also
Scaling, MAXSCALEFACTOR.

Parent Topic Control Parameters

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