84 lines
2.5 KiB
PHP
84 lines
2.5 KiB
PHP
<?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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* Explaining category axis ordering
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*
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* Other:
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* None specifc
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*
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* $Id: category_axis_explanation.php,v 1.4 2005/08/03 21:21:52 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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$Canvas =& Image_Canvas::factory('png', array('width' => 500, 'height' => 200, 'antialias' => true));
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// create the graph
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$Graph =& Image_Graph::factory('graph', $Canvas);
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// add a TrueType font
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$Font =& $Graph->addNew('font', 'Verdana');
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// set the font size to 11 pixels
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$Font->setSize(9);
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$Graph->setFont($Font);
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$Plotarea =& $Graph->addNew('plotarea');
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$Datasets[0] =& Image_Graph::factory('dataset');
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$Datasets[1] =& Image_Graph::factory('dataset');
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$Datasets[2] =& Image_Graph::factory('dataset');
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$Datasets[0]->addPoint('this', 1);
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$Datasets[0]->addPoint('can', 3);
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$Datasets[0]->addPoint('make', 2);
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$Datasets[0]->addPoint('correctly', 1);
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$Datasets[1]->addPoint('sentence', 1);
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$Datasets[1]->addPoint('can', 1);
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$Datasets[1]->addPoint('sense', 2);
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$Datasets[1]->addPoint('written', 2);
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$Datasets[1]->addPoint('correctly', 2);
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$Datasets[2]->addPoint('actually', 3);
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$Datasets[2]->addPoint('make', 2);
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$Datasets[2]->addPoint('if', 3);
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$Datasets[2]->addPoint('written', 1);
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// expecting the following X-axis order
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// 'this sentence can actually make sense if written correctly'
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// making points be placed in the following order:
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//
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// |this|sentence|can|actually|make|sense|if|written|correctly|
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// 1 |_1__|________|_2_|________|_3__|_____|__|_______|____4____|
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// 2 |____|___1____|_2_|________|____|__3__|__|___4___|____5____|
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// 3 |____|________|___|___1____|_2__|_____|3_|___4___|_________|
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//
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// if an append-algorithm were to be (wrongly) used it would yield
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// 'this can make correctly sentence sense written actually if'
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// making points be placed in the following order:
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//
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// |this|can|make|correctly|sentence|sense|written|actually|if|
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// 1 |_1__|_2_|_3__|____4____|________|_____|_______|________|__|
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// 2 |____|_2_|____|____5____|___1____|__3__|___4___|________|__|
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// 3 |____|___|_2__|_________|________|_____|___4___|___1____|3_|
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$Plot1 =& $Plotarea->addNew('line', array(&$Datasets[0]));
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$Plot2 =& $Plotarea->addNew('line', array(&$Datasets[1]));
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$Plot3 =& $Plotarea->addNew('line', array(&$Datasets[2]));
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$Plot1->setLineColor('red');
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$Plot2->setLineColor('blue');
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$Plot3->setLineColor('green');
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// output the Graph
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$Graph->done();
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?>
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