Default Stop Criterion

Default Stop Criterion implementation

Description

Reference documentation for the default stop criterion implementation.

The default stop criterion implementation allows you to set two criteria for termination of the algorithm it is registered on, e.g., traffic assignment equilibrium search. These comprise an epsilon for the found (relative) gap and a cut-off based on the number of iterations conducted. When either criterion is met, the algorithm is flagged for termination and stops.

Defaults

Name	Default	Type	Unit
DEFAULT_EPSILON	0.001	`float`	`None`
DEFAULT_MAX_ITERATIONS	500	`float`	`None`

Methods

The default stop criterion exposes the following methods

Name	Description
`set_max_iterations(+)`	Set the maximum number of iterations
`get_max_iterations()`	Collect the maximum number of iterations
`set_epsilon(+)`	Set the upper bound epsilon value
`get_epsilon()`	Collect the upper bound epsilon value

Properties

This class has no properties (yet)

Example 1

from planit import *

# choose to run PLANit with a traditional static traffic assignment method
planit_instance = PLANit()
planit_instance.set(TrafficAssignment.TRADITIONAL_STATIC)

# set the maximum number of allowed iterations to 20 
planit_instance.assignment.gap_function.stop_criterion.set_max_iterations(20)