Initializing help system before first use

XSLPcascade, XPRSslpcascade

Purpose
Re-calculate consistent values for SLP variables based on the current values of the remaining variables.
Topic areas
SLP, Solution Process, Cascading
Synopsis
int XPRS_CC XSLPcascade(XSLPprob prob);
Argument
prob 
The current SLP problem.
Example

The following example changes the solution value for column 91, and then re-calculates the values of those dependent on it. 


int ColNum;
double Value;

ColNum = 91;
XSLPgetvar(prob, ColNum, NULL, NULL, NULL, NULL,
           NULL, NULL, &Value, NULL, NULL, NULL,
           NULL, NULL, NULL, NULL, NULL);

Value = Value + 1.42;
XSLPchgvar(prob, ColNum, NULL, NULL, NULL, NULL,
           NULL, NULL, &Value, NULL, NULL, NULL,
           NULL);
XSLPcascade(prob);

XSLPgetvar and XSLPchgvar are being used to get and change the current value of a single variable.

Provided no other values have been changed since the last execution of XSLPcascade, values will be changed only for variables which depend on column 91.


Further information
1. See the section on cascading for an extended discussion of the types of cascading which can be performed.
2. XSLPcascade is called automatically during the SLP iteration process and so it is not normally necessary to perform an explicit cascade calculation.
3. The variables are re-calculated in accordance with the order generated by XSLPcascadeorder.
Related topics
XSLPcascadeorder, XSLP_CASCADE, XSLP_CASCADENLIMIT, XSLP_CASCADETOL_PA, XSLP_CASCADETOL_PR

Parent Topic Library functions

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