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# XSLPaddtolsets

Purpose
This subroutine is deprecated and will be removed in a future release.
Add sets of standard tolerance values to an SLP problem.
Topic areas
SLP, SLP-convergence
Synopsis
`int XPRS_CC XSLPaddtolsets(XSLPprob prob, int ntol, double *tol);`
Arguments

prob | The current SLP problem.
ntol | The number of tolerance sets to be added.
tol | Double array of ( ntol * 9) items containing the 9 tolerance values for each set in order.

Example
The following example creates two tolerance sets: the first has values of 0.005 for all tolerances; the second has values of 0.001 for relative tolerances (numbers 2,4,6,8), values of 0.01 for absolute tolerances (numbers 1,3,5,7) and zero for the closure tolerance (number 0).

    double tol[18];
    for (i=0;i<9;i++) tol[i] = 0.005;
    tol[9] = 0;
    for (i=10;i<18;i=i+2) tol[i] = 0.01;
    for (i=11;i<18;i=i+2) tol[i] = 0.001;
    XSLPaddtolsets(prob, 2, tol);

Further information
1. A tolerance set is an array of 9 values containing the following tolerances:

Entry / Bit | Tolerance | XSLP constant | XSLP bit constant
--- | --- | --- | ---
0 | Closure tolerance (TC) | XSLP_TOLSET_TC | XSLP_TOLSETBIT_TC
1 | Absolute delta tolerance (TA) | XSLP_TOLSET_TA | XSLP_TOLSETBIT_TA
2 | Relative delta tolerance (RA) | XSLP_TOLSET_RA | XSLP_TOLSETBIT_RA
3 | Absolute coefficient tolerance (TM) | XSLP_TOLSET_TM | XSLP_TOLSETBIT_TM
4 | Relative coefficient tolerance (RM) | XSLP_TOLSET_RM | XSLP_TOLSETBIT_RM
5 | Absolute impact tolerance (TI) | XSLP_TOLSET_TI | XSLP_TOLSETBIT_TI
6 | Relative impact tolerance (RI) | XSLP_TOLSET_RI | XSLP_TOLSETBIT_RI
7 | Absolute slack tolerance (TS) | XSLP_TOLSET_TS | XSLP_TOLSETBIT_TS
8 | Relative slack tolerance (RS) | XSLP_TOLSET_RS | XSLP_TOLSETBIT_RS

2. The XSLP_TOLSET constants can be used to access the corresponding entry in the value arrays, while the XSLP_TOLSETBIT constants are used to set or retrieve which tolerance values are used for a given SLP variable.
3. Once created, a tolerance set can be used to set the tolerances for any SLP variable.
4. If a tolerance value is zero, then the default tolerance will be used instead. To force the use of a tolerance, use the XSLPchgtolset function and set the Status variable appropriately.
5. See the section Convergence criteria for a fuller description of tolerances and their uses.
6. The add functions load additional items into the SLP problem. The corresponding load functions delete any existing items first.
Related topics
XSLPchgtolset, XSLPdeltolsets, XSLPgettolset, XSLPloadtolsets
Parent Topic Library functions and the programming interface

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