startEval

OPL numerical expression (scheduling) used to evaluate a piecewise linear function at the start of an interval

Purpose

OPL numerical expression (scheduling) used to evaluate a piecewise linear function at the start of an interval.

context	type
Model files (.mod)	dexpr float

Syntax

dexpr float startEval (a,f[,dval]);
 
Where:

pwlFunction f;
dvar interval a;
float dval;

Description

This numerical expression is used to evaluate a piecewise linear function at the start of an interval. Special care must be taken for optional intervals: in this case a float value dval must be specified, to represent the value of the expression when the interval is absent. If this value is omitted, it is considered to be 0.

For an example of using a numerical expression, see endEval.