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File: example/matrixpararun.php

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  Classes of Benjamin Vatter  >  PHP Clarke and Wright Algorithm  >  example/matrixpararun.php  >  Download  
File: example/matrixpararun.php
Role: Example script
Content type: text/plain
Description: parametric run of the class
Class: PHP Clarke and Wright Algorithm
Solve a truck routing problem with Clarke & Wright
Author: By
Last change:
Date: 1 year ago
Size: 2,900 bytes
 

Contents

Class file image Download

<?php
/*
parametric run execution of cw model
 */

set_time_limit(2400);
ini_set('error_log','error_log.txt');
include(
'matrixcw.php');
include(
'data.php');




$time_start = microtime(true);
$min_unstisfied = count($client_nodes);
$saved_routes;
$saved_unstisfied;
$saved_total_cost;
$saved_reassign_cost;
$min_total_cost=0;
$max = 100;
for(
$n=0 ; $n<$max ; $n++){
   
$cw = new cw();
   
$cw->loadData($client_nodes,$client_demands,$distance_matrix,$truck_capacity);
    if(
$n==0){
       
$cw->cwParametricSavings(1,0); //no parametric run case for comparison
       
}
    else{
       
$cw->cwParametricSavings();
        }
   
$cw->sortSavings();
   
$cw->cwroutes();
   
$cw->finishingTouch();

    if(
count($cw->unsatisfied)<$min_unstisfied || (count($cw->unsatisfied)==$min_unstisfied && $min_total_cost>$cw->total_cost)){
       
$min_unstisfied = count($cw->unsatisfied);
       
$min_total_cost = $cw->total_cost;
       
$saved_routes = $cw->routes;
       
$saved_total_cost = $cw->total_cost;
       
$saved_unstisfied = $cw->unsatisfied;
       
$saved_reassign_cost = $cw->reassing_cost;
    }

}
   
$time_end = microtime(true);
    echo
"<h1>Clarke & Wright savings Hueristics with assymetric costs and time windows : Parametric Run $max iterations</h1><br>";
    foreach (
$saved_routes as $key => $value) {
        echo
"<h2>Route number {$key}</h2><br>";
        echo
"<b>Truck: </b>".$value['truck']."<br>";
        echo
"<b>Path: </b>".implode('->',$value['road'])."<br>";
        echo
"<b>Total Distance of Path: </b>".$value['total_distance']."<br>";
        echo
"<b>Total Time of Path: </b>".$value['total_time']."<br>";
        echo
"<b>Time back at depot: </b>".$value['time_back_at_depot']."<br>";
        echo
"<b>Weight capacity of truck : </b>".$value['truck_max_weight']." Kg<br>";
        echo
"<b>Total weight of order : </b>".$value['total_weight']." Kg<br>";
        echo
"<b>Volume capacity of truck : </b>".$value['truck_max_volume']." M3<br>";
        echo
"<b>Total volume of order : </b>".$value['total_volume']." M3<br>";
        echo
"<br><br>";
    }
    if(
count($saved_unstisfied)>1){
    echo
"The following clients weren't visited : <br>";
   
?>
<table>
            <thead>
                <th>Client</th><th>Reason</th>
            </thead>
            <tbody>
    <?php foreach($saved_unstisfied as $client=>$reason){ ?>
<tr><td><?=$client?></td><td><?=$reason?></td></tr>
    <?php } ?>
</tbody>
        <table>
            <br>
    <?php
   
}
    else echo
"all clients were visite! <br>";
    echo
"The total cost for the routing problem is : ".$saved_total_cost." seconds <br>";
    echo
"The total excution time of the Hueristics was : ".($time_end-$time_start)." seconds "."<br>";
    echo
"The total reassign cost of the process was : ".$saved_reassign_cost."<br>"."<br>";

    if(
count($conversion)>0){
        echo
"the conversion for duplicate nodes was as follow : <br>";
        foreach (
$conversion as $key => $value) {
            list(
$from,$to) = $value;
           
$num = $key+2;
            echo
"$from -> $to <br>";
        }
    }