<?php

require_once 'Base/src/base.php';
function __autoload( $class )
{
    ezcBase::autoload( $class );
}

$graph = new ezcGraphLineChart();
$graph->options->fillLines = 220;

$graph->palette = new ezcGraphPaletteBlack();
$graph->title = 'Numeric data on logaritmical axis';
$graph->legend->position = ezcGraph::BOTTOM;

$graph->xAxis = new ezcGraphChartElementNumericAxis();
$graph->yAxis = new ezcGraphChartElementLogarithmicalAxis();

$graph->data['x^2'] = new ezcGraphNumericDataSet( 
    -10, // Start value
    10,  // End value
    create_function(
        '$x',
        'return pow( $x, 2 ) + 1;'
    )
);
$graph->data['x^2']->symbol = ezcGraph::NO_SYMBOL;

$graph->data['x^4'] = new ezcGraphNumericDataSet( 
    -10, // Start value
    10,  // End value
    create_function(
        '$x',
        'return pow( $x, 4 ) + 1;'
    )
);
$graph->data['x^4']->symbol = ezcGraph::NO_SYMBOL;

$graph->data['x^6'] = new ezcGraphNumericDataSet( 
    -10, // Start value
    10,  // End value
    create_function(
        '$x',
        'return pow( $x, 6 ) + 1;'
    )
);
$graph->data['x^6']->symbol = ezcGraph::NO_SYMBOL;

$graph->driver->options->assumedTextCharacterWidth= .6;

$graph->render( 500, 250, 'numeric_logarithmical_line_chart.svg' );

?>