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Model.setPWLObj()
setPWLObj ( var, x, y )
Set a piecewise-linear objective function for a variable.
The arguments to this method specify a list of points that define a
piecewise-linear objective function for a single variable.
Specifically, the 
and 
arguments give coordinates for the
vertices of the function.
For additional details on piecewise-linear objective functions, refer to this discussion.
Arguments:
var: A Var object that gives the variable whose objective function is being set.
x: The values for the points that define the piecewise-linear function. Must be in non-decreasing order.
y: The values for the points that define the piecewise-linear function.
Example usage:
model.setPWLObj(var, [1, 3, 5], [1, 2, 4])
