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authorDaniel Stefan Haischt <dsh@pfsense.org>2006-07-27 01:32:35 +0000
committerDaniel Stefan Haischt <dsh@pfsense.org>2006-07-27 01:32:35 +0000
commit4427f59c63f88971deeaaa9809374df18d1eb288 (patch)
tree714b6c877eaa68ac244dae440254670363afc34a /packages/dspam/pear/Image/Graph/Plot/Fit/Line.php
parent3c8397a8083a2d9e3838440e5b7f3d51705713ef (diff)
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- added missing PEAR Image dependency
Diffstat (limited to 'packages/dspam/pear/Image/Graph/Plot/Fit/Line.php')
-rw-r--r--packages/dspam/pear/Image/Graph/Plot/Fit/Line.php118
1 files changed, 118 insertions, 0 deletions
diff --git a/packages/dspam/pear/Image/Graph/Plot/Fit/Line.php b/packages/dspam/pear/Image/Graph/Plot/Fit/Line.php
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+++ b/packages/dspam/pear/Image/Graph/Plot/Fit/Line.php
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+<?php
+
+/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
+
+/**
+ * Image_Graph - PEAR PHP OO Graph Rendering Utility.
+ *
+ * PHP versions 4 and 5
+ *
+ * LICENSE: This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at your
+ * option) any later version. This library is distributed in the hope that it
+ * will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
+ * General Public License for more details. You should have received a copy of
+ * the GNU Lesser General Public License along with this library; if not, write
+ * to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ * 02111-1307 USA
+ *
+ * @category Images
+ * @package Image_Graph
+ * @subpackage Plot
+ * @author Jesper Veggerby <pear.nosey@veggerby.dk>
+ * @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
+ * @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
+ * @version CVS: $Id$
+ * @link http://pear.php.net/package/Image_Graph
+ */
+
+/**
+ * Include file Image/Graph/Plot.php
+ */
+require_once 'Image/Graph/Plot.php';
+
+/**
+ * Include file Image/Graph/Tool.php
+ */
+require_once 'Image/Graph/Tool.php';
+
+/**
+ * Fit the graph (to a line using linear regression).
+ *
+ * @category Images
+ * @package Image_Graph
+ * @subpackage Plot
+ * @author Jesper Veggerby <pear.nosey@veggerby.dk>
+ * @copyright Copyright (C) 2003, 2004 Jesper Veggerby Hansen
+ * @license http://www.gnu.org/copyleft/lesser.html LGPL License 2.1
+ * @version Release: @package_version@
+ * @link http://pear.php.net/package/Image_Graph
+ */
+class Image_Graph_Plot_Fit_Line extends Image_Graph_Plot
+{
+
+ /**
+ * Perform the actual drawing on the legend.
+ *
+ * @param int $x0 The top-left x-coordinate
+ * @param int $y0 The top-left y-coordinate
+ * @param int $x1 The bottom-right x-coordinate
+ * @param int $y1 The bottom-right y-coordinate
+ * @access private
+ */
+ function _drawLegendSample($x0, $y0, $x1, $y1)
+ {
+ $y = ($y0 + $y1) / 2;
+ $dy = abs($y1 - $y0) / 6;
+ $this->_canvas->addVertex(array('x' => $x0, 'y' => $y + $dy));
+ $this->_canvas->addVertex(array('x' => $x1, 'y' => $y - $dy));
+ $this->_canvas->polygon(array('connect' => false));
+ }
+
+ /**
+ * Output the plot
+ *
+ * @return bool Was the output 'good' (true) or 'bad' (false).
+ * @access private
+ */
+ function _done()
+ {
+ if (Image_Graph_Plot::_done() === false) {
+ return false;
+ }
+
+ $this->_canvas->startGroup(get_class($this) . '_' . $this->_title);
+ $this->_clip(true);
+ $keys = array_keys($this->_dataset);
+ foreach ($keys as $key) {
+ $dataset =& $this->_dataset[$key];
+ $dataset->_reset();
+ $data = array();
+ while ($point = $dataset->_next()) {
+ $data[] = array(
+ 'X' => $this->_pointX($point),
+ 'Y' => $this->_pointY($point)
+ );
+ }
+
+ $regression = Image_Graph_Tool::calculateLinearRegression($data);
+ $this->_getLineStyle($key);
+ $this->_canvas->line(
+ array(
+ 'x0' => $this->_left,
+ 'y0' => $this->_left * $regression['slope'] + $regression['intersection'],
+ 'x1' => $this->_right,
+ 'y1' => $this->_right * $regression['slope'] + $regression['intersection']
+ )
+ );
+ }
+ $this->_clip(false);
+ $this->_canvas->endGroup();
+
+ return true;
+ }
+}
+
+?>