<?php
# PHPlot Example: Simple line graph
require_once 'phplot.php';

/*
$data = array(
  array('', 1800,   5), array('', 1810,   7), array('', 1820,  10),
  array('', 1830,  13), array('', 1840,  17), array('', 1850,  23),
  array('', 1860,  31), array('', 1870,  39), array('', 1880,  50),
  array('', 1890,  63), array('', 1900,  76), array('', 1910,  92),
  array('', 1920, 106), array('', 1930, 123), array('', 1940, 132),
  array('', 1950, 151), array('', 1960, 179), array('', 1970, 203),
  array('', 1980, 227), array('', 1990, 249), array('', 2000, 281),
);
*/
$data1 = array(	'', '', '', '', '' );
$data2 = array(	1800, 1850, 1900, 1950, 2000 );
$data3 = array(	10, 20, 30, 40, 50 );
$data4 = array( 50, 40, 30, 20, 10 );

$data = array();
for ($ii=0; $ii<sizeof($data1); $ii++) {
	$data[] = array( $data1[$ii], $data2[$ii], $data3[$ii], $data4[$ii] );
	//echo $data[$ii];
}

$plot = new PHPlot(800, 600);
$plot->SetImageBorderType('plain');

$plot->SetPlotType('lines');
$plot->SetDataType('data-data');
$plot->SetDataValues($data);

# Main plot title:
$plot->SetTitle('US Population, in millions');

# Make sure Y axis starts at 0:
$plot->SetPlotAreaWorld(NULL, 0, NULL, NULL);

$plot->DrawGraph();