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XSLPchgtolset

Purpose

Add or change a set of convergence tolerances used for SLP variables

Synopsis

int XPRS_CC XSLPchgtolset(XSLPprob Prob, int nSLPTol, int *Status, double *Tols);

Arguments

Prob	The current SLP problem.
nSLPTol	Tolerance set for which values are to be changed. A zero value for nSLPTol will create a new set.
Status	Address of an integer holding a bitmap describing which tolerances are active in this set. See below for the settings.
Tols	Array of 9 double precision values holding the values for the corresponding tolerances.

Example

The following example creates a new tolerance set with the default values for all tolerances except the relative delta tolerance, which is set to 0.005. It then changes the value of the absolute delta and absolute impact tolerances in tolerance set 6 to 0.015

int Status;
double Tols[9];

Tols[2] = 0.005;
Status = 1<<2;
XSLPchgtolset(Prob, 0, Status, Tols);
Tols[1] = Tols[5] = 0.015;
Status = 1<<1 | 1<<5;
XSLPchgtolset(Prob, 6, Status, Tols);

Further information

The bits in Status are set to indicate that the corresponding tolerance is to be changed in the tolerance set. The meaning of the bits is as follows:

Entry Tolerance

0 Closure tolerance (TC)

1 Absolute delta tolerance (TA)

2 Relative delta tolerance (RA)

3 Absolute coefficient tolerance (TM)

4 Relative coefficient tolerance (RM)

5 Absolute impact tolerance (TI)

6 Relative impact tolerance (RI)

7 Absolute slack tolerance (TS)

8 Relative slack tolerance (RS)

Entry	Tolerance
0	Closure tolerance (TC)
1	Absolute delta tolerance (TA)
2	Relative delta tolerance (RA)
3	Absolute coefficient tolerance (TM)
4	Relative coefficient tolerance (RM)
5	Absolute impact tolerance (TI)
6	Relative impact tolerance (RI)
7	Absolute slack tolerance (TS)
8	Relative slack tolerance (RS)

The members of the Tols array corresponding to nonzero bit settings in Status will be used to change the tolerance set. So, for example, if bit 3 is set in Status, then Tols[3] will replace the current value of the absolute coefficient tolerance. If a bit is not set in Status, the value of the corresponding element of Tols is unimportant.