104 lines
3.1 KiB
PHP
104 lines
3.1 KiB
PHP
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<?php
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/**
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* Usage example for Image_Graph.
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*
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* Main purpose:
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* Demonstrate logarithmic axis
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*
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* Other:
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* Matrix layout, Axis titles
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*
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* $Id: log_axis.php,v 1.4 2005/08/03 21:21:53 nosey Exp $
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*
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* @package Image_Graph
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* @author Jesper Veggerby <pear.nosey@veggerby.dk>
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*/
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require_once 'Image/Graph.php';
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require_once 'Image/Canvas.php';
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$Canvas =& Image_Canvas::factory('png', array('width' => 600, 'height' => 400, 'antialias' => true));
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// create the graph
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$Graph =& Image_Graph::factory('graph', $Canvas);
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// add a TrueType font
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$Font =& $Graph->addNew('font', 'Verdana');
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// set the font size to 15 pixels
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$Font->setSize(8);
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// add a title using the created font
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for ($i = 0; $i < 2; $i++) {
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for ($j = 0; $j < 2; $j++) {
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$Axis['X'][($i*2+$j)] = 'axis' . ($i % 2 == 0 ? '' : '_log');
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$Axis['Y'][($i*2+$j)] = 'axis' . ($j % 2 == 0 ? '' : '_log');
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}
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}
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for ($i = 0; $i < 4; $i++) {
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$Plotarea[$i] =& Image_Graph::factory('plotarea', array($Axis['X'][$i], $Axis['Y'][$i]));
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}
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$Graph->setFont($Font);
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// create the plotarea
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$Graph->add(
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Image_Graph::vertical(
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Image_Graph::factory('title', array('Logarithmic Axis', 11)),
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Image_Graph::vertical(
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Image_Graph::horizontal(
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Image_Graph::vertical(
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Image_Graph::factory('title', array('Normal Y-Axis', array('size' => 10, 'angle' => 90))),
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Image_Graph::factory('title', array('Logarithmic Y-Axis', array('size' => 10, 'angle' => 90)))
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),
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Image_Graph::horizontal(
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Image_Graph::vertical(
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Image_Graph::factory('title', array('Normal X-Axis', 10)),
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Image_Graph::vertical(
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$Plotarea[0],
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$Plotarea[1]
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),
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7
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),
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Image_Graph::vertical(
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Image_Graph::factory('Image_Graph_Title', array('Logarithmic X-Axis', 10)),
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Image_Graph::vertical(
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$Plotarea[2],
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$Plotarea[3]
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),
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7
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)
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),
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4
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),
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$Legend = Image_Graph::factory('Image_Graph_Legend'),
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92
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),
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5
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)
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);
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$Legend->setPlotarea($Plotarea[0]);
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$Dataset = Image_Graph::factory('dataset');
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$i = 1;
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while ($i <= 10) {
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$Dataset->addPoint($i, $i*$i);
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$i++;
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}
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for ($i = 0; $i < 4; $i++) {
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$Plotarea[$i]->addNew('line_grid', false, IMAGE_GRAPH_AXIS_X);
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$Plotarea[$i]->addNew('line_grid', false, IMAGE_GRAPH_AXIS_Y);
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if ($i % 2 == 1) {
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$Axis =& $Plotarea[$i]->getAxis(IMAGE_GRAPH_AXIS_Y);
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$Axis->setLabelInterval(array(1, 2, 3, 5, 10, 20, 30, 50, 100));
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}
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$Plot =& $Plotarea[$i]->addNew('line', array(&$Dataset));
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$Plot->setLineColor('red');
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$Plot->setTitle("x^2");
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}
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$Graph->done();
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?>
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