From 55eddd7accf2c5f9b0f52b22a010c4c4b7c130d1 Mon Sep 17 00:00:00 2001
From: Bill Marquette <bill.marquette@gmail.com>
Date: Fri, 6 Feb 2009 19:18:00 -0600
Subject: mv packages to config dir to match web layout

---
 config/dspam/pear/Image/Graph/Dataset/Function.php | 147 +++++++++++++++++++++
 1 file changed, 147 insertions(+)
 create mode 100644 config/dspam/pear/Image/Graph/Dataset/Function.php

(limited to 'config/dspam/pear/Image/Graph/Dataset/Function.php')

diff --git a/config/dspam/pear/Image/Graph/Dataset/Function.php b/config/dspam/pear/Image/Graph/Dataset/Function.php
new file mode 100644
index 00000000..08174b1d
--- /dev/null
+++ b/config/dspam/pear/Image/Graph/Dataset/Function.php
@@ -0,0 +1,147 @@
+<?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 Dataset
+ * @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/Dataset.php
+ */
+require_once 'Image/Graph/Dataset.php';
+
+/**
+ * Function data set, points are generated by calling an external function.
+ *
+ * The function must be a single variable function and return a the result,
+ * builtin  functions that are fx sin() or cos(). User defined function can be
+ * used if they are such, i.e: function myFunction($variable)
+ *
+ * @category   Images
+ * @package    Image_Graph
+ * @subpackage Dataset
+ * @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_Dataset_Function extends Image_Graph_Dataset
+{
+
+    /**
+     * The name of the function
+     * @var string
+     * @access private
+     */
+    var $_dataFunction;
+
+    /**
+     * Image_Graph_FunctionDataset [Constructor]
+     *
+     * @param double $minimumX The minimum X value
+     * @param double $maximumX The maximum X value
+     * @param string $function The name of the function, if must be a single
+     * parameter function like fx sin(x) or cos(x)
+     * @param int $points The number of points to create
+     */
+    function Image_Graph_Dataset_Function($minimumX, $maximumX, $function, $points)
+    {
+        parent::Image_Graph_Dataset();
+        $this->_minimumX = $minimumX;
+        $this->_maximumX = $maximumX;
+        $this->_dataFunction = $function;
+        $this->_count = $points;
+        $this->_calculateMaxima();
+    }
+
+    /**
+     * Add a point to the dataset.
+     *
+     * You can't add points to a function dataset
+     *
+     * @param int $x The X value to add
+     * @param int $y The Y value to add, can be omited
+     * @param var $ID The ID of the point
+     */
+    function addPoint($x, $y = false, $ID = false)
+    {
+    }
+
+    /**
+     * Gets a Y point from the dataset
+     *
+     * @param var $x The variable to apply the function to
+     * @return var The function applied to the X value
+     * @access private
+     */
+    function _getPointY($x)
+    {
+        $function = $this->_dataFunction;
+        return $function ($x);
+    }
+
+    /**
+     * The number of values in the dataset
+     *
+     * @return int The number of values in the dataset
+     * @access private
+     */
+    function _count()
+    {
+        return $this->_count;
+    }
+
+    /**
+     * The interval between 2 adjacent Y values
+     *
+     * @return var The interval
+     * @access private
+     */
+    function _stepX()
+    {
+        return ($this->_maximumX - $this->_minimumX) / $this->_count();
+    }
+
+    /**
+     * Calculates the Y extrema of the function
+     *
+     * @access private
+     */
+    function _calculateMaxima()
+    {
+        $x = $this->_minimumX;
+        while ($x <= $this->_maximumX) {
+            $y = $this->_getPointY($x);
+            $this->_minimumY = min($y, $this->_minimumY);
+            $this->_maximumY = max($y, $this->_maximumY);
+            $x += $this->_stepX();
+        }
+    }
+
+}
+
+?>
\ No newline at end of file
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