62 lines
1.7 KiB
PHP
62 lines
1.7 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 vector function data
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*
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* Other:
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* Setting axis intersection
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*
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* $Id: vector_function.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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// create the graph
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$Graph =& Image_Graph::factory('graph', array(400, 300));
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// add a TrueType font
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$Font =& $Graph->addNew('font', 'Verdana');
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// set the font size to 11 pixels
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$Font->setSize(8);
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$Graph->setFont($Font);
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$Graph->add(
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Image_Graph::vertical(
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Image_Graph::factory('title', array('Vector Function Chart Sample', 12)),
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Image_Graph::vertical(
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// create the plotarea with a normal linear axis as x-axis!
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$Plotarea = Image_Graph::factory('plotarea', 'axis'),
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$Legend = Image_Graph::factory('legend'),
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90
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),
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5
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)
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);
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$Legend->setPlotarea($Plotarea);
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function tcost($t) { return $t*cos($t); }
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function tsint($t) { return $t*sin($t); }
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$GridX =& $Plotarea->addNew('line_grid', null, IMAGE_GRAPH_AXIS_X);
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$GridY =& $Plotarea->addNew('line_grid', null, IMAGE_GRAPH_AXIS_Y);
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$LineStyle =& Image_Graph::factory('Image_Graph_Line_Dashed', array('lightgrey', 'transparent'));
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$GridX->setLineStyle($LineStyle);
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$GridY->setLineStyle($LineStyle);
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$Dataset =& Image_Graph::factory('vector', array(0, 20, 'tcost', 'tsint', 200));
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// create the 1st plot as smoothed area chart using the 1st dataset
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$Plot =& $Plotarea->addNew('line', array(&$Dataset));
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$Plot->setLineColor('red');
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$Plot->setTitle('f(t) = { t*cos(t), t*sin(t) }');
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$AxisY =& $Plotarea->getAxis(IMAGE_GRAPH_AXIS_Y);
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$AxisY->setAxisIntersection(0);
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$Graph->done();
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?>
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