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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 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
- */
-
-
-/**
- * Data set used to represent a data collection to plot in a chart
- *
- * @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
- * @abstract
- */
-class Image_Graph_Dataset
-{
-
- /**
- * The pointer of the data set
- * @var int
- * @access private
- */
- var $_posX = 0;
-
- /**
- * The minimum X value of the dataset
- * @var int
- * @access private
- */
- var $_minimumX = 0;
-
- /**
- * The maximum X value of the dataset
- * @var int
- * @access private
- */
- var $_maximumX = 0;
-
- /**
- * The minimum Y value of the dataset
- * @var int
- * @access private
- */
- var $_minimumY = 0;
-
- /**
- * The maximum Y value of the dataset
- * @var int
- * @access private
- */
- var $_maximumY = 0;
-
- /**
- * The number of points in the dataset
- * @var int
- * @access private
- */
- var $_count = 0;
-
- /**
- * The name of the dataset, used for legending
- * @var string
- * @access private
- */
- var $_name = '';
-
- /**
- * Image_Graph_Dataset [Constructor]
- */
- function Image_Graph_Dataset()
- {
- }
-
- /**
- * Sets the name of the data set, used for legending
- *
- * @param string $name The name of the dataset
- */
- function setName($name)
- {
- $this->_name = $name;
- }
-
- /**
- * Add a point to the dataset
- *
- * $ID can contain either the ID of the point, i.e. 'DK', 123, 'George', etc. or it can contain
- * values used for creation of the HTML image map. This is achieved using is an an associated array
- * with the following values:
- *
- * 'url' The URL to create the link to
- *
- * 'alt' [optional] The alt text on the link
- *
- * 'target' [optional] The target of the link
- *
- * 'htmltags' [optional] An associated array with html tags (tag as key), fx. 'onMouseOver' => 'history.go(-1);', 'id' => 'thelink'
- *
- * @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, $ID = false)
- {
- if ($y !== null) {
- if (is_array($y)) {
- $maxY = max($y);
- $minY = min($y);
- } else {
- $maxY = $y;
- $minY = $y;
- }
- }
-
- if ($this->_count) {
- $this->_minimumX = min($x, $this->_minimumX);
- $this->_maximumX = max($x, $this->_maximumX);
- if ($y !== null) {
- $this->_minimumY = min($minY, $this->_minimumY);
- $this->_maximumY = max($maxY, $this->_maximumY);
- }
- } else {
- $this->_minimumX = $x;
- $this->_maximumX = $x;
- if ($y !== null) {
- $this->_minimumY = $minY;
- $this->_maximumY = $maxY;
- }
- }
-
- $this->_count++;
- }
-
- /**
- * The number of values in the dataset
- *
- * @return int The number of values in the dataset
- */
- function count()
- {
- return $this->_count;
- }
-
- /**
- * Gets a X point from the dataset
- *
- * @param var $x The variable to return an X value from, fx in a vector
- * function data set
- * @return var The X value of the variable
- * @access private
- */
- function _getPointX($x)
- {
- return $x;
- }
-
- /**
- * Gets a Y point from the dataset
- *
- * @param var $x The variable to return an Y value from, fx in a vector
- * function data set
- * @return var The Y value of the variable
- * @access private
- */
- function _getPointY($x)
- {
- return $x;
- }
-
- /**
- * Gets a ID from the dataset
- *
- * @param var $x The variable to return an Y value from, fx in a vector
- * function data set
- * @return var The ID value of the variable
- * @access private
- */
- function _getPointID($x)
- {
- return false;
- }
-
- /**
- * Gets point data from the dataset
- *
- * @param var $x The variable to return an Y value from, fx in a vector
- * function data set
- * @return array The data for the point
- * @access private
- */
- function _getPointData($x)
- {
- return false;
- }
-
- /**
- * The minimum X value
- *
- * @return var The minimum X value
- */
- function minimumX()
- {
- return $this->_minimumX;
- }
-
- /**
- * The maximum X value
- *
- * @return var The maximum X value
- */
- function maximumX()
- {
- return $this->_maximumX;
- }
-
- /**
- * The minimum Y value
- *
- * @return var The minimum Y value
- */
- function minimumY()
- {
- return $this->_minimumY;
- }
-
- /**
- * The maximum Y value
- *
- * @return var The maximum Y value
- */
- function maximumY()
- {
- return $this->_maximumY;
- }
-
- /**
- * The first point
- *
- * @return array The last point
- */
- function first()
- {
- return array('X' => $this->minimumX(), 'Y' => $this->minimumY());
- }
-
- /**
- * The last point
- *
- * @return array The first point
- */
- function last()
- {
- return array('X' => $this->maximumX(), 'Y' => $this->maximumY());
- }
-
- /**
- * The minimum X value
- *
- * @param var $value The minimum X value
- * @access private
- */
- function _setMinimumX($value)
- {
- $this->_minimumX = $value;
- }
-
- /**
- * The maximum X value
- *
- * @param var $value The maximum X value
- * @access private
- */
- function _setMaximumX($value)
- {
- $this->_maximumX = $value;
- }
-
- /**
- * The minimum Y value
- *
- * @param var $value The minimum X value
- * @access private
- */
- function _setMinimumY($value)
- {
- $this->_minimumY = $value;
- }
-
- /**
- * The maximum Y value
- *
- * @param var $value The maximum X value
- * @access private
- */
- function _setMaximumY($value)
- {
- $this->_maximumY = $value;
- }
-
- /**
- * The interval between 2 adjacent X values
- *
- * @return var The interval
- * @access private
- */
- function _stepX()
- {
- return 1;
- }
-
- /**
- * The interval between 2 adjacent Y values
- *
- * @return var The interval
- * @access private
- */
- function _stepY()
- {
- return 1;
- }
-
- /**
- * Reset the intertal dataset pointer
- *
- * @return var The first X value
- * @access private
- */
- function _reset()
- {
- $this->_posX = $this->_minimumX;
- return $this->_posX;
- }
-
- /**
- * Get a point close to the internal pointer
- *
- * @param int Step Number of points next to the internal pointer, negative
- * Step is towards lower X values, positive towards higher X values
- * @return array The point
- * @access private
- */
- function _nearby($step = 0)
- {
- $x = $this->_getPointX($this->_posX + $this->_stepX() * $step);
- $y = $this->_getPointY($this->_posX + $this->_stepX() * $step);
- $ID = $this->_getPointID($this->_posX + $this->_stepX() * $step);
- $data = $this->_getPointData($this->_posX + $this->_stepX() * $step);
- if (($x === false) || ($y === false)) {
- return false;
- } else {
- return array ('X' => $x, 'Y' => $y, 'ID' => $ID, 'data' => $data);
- }
- }
-
- /**
- * Get the next point the internal pointer refers to and advance the pointer
- *
- * @return array The next point
- * @access private
- */
- function _next()
- {
- if ($this->_posX > $this->_maximumX) {
- return false;
- }
-
- $x = $this->_getPointX($this->_posX);
- $y = $this->_getPointY($this->_posX);
- $ID = $this->_getPointID($this->_posX);
- $data = $this->_getPointData($this->_posX);
- $this->_posX += $this->_stepX();
-
- return array ('X' => $x, 'Y' => $y, 'ID' => $ID, 'data' => $data);
- }
-
- /**
- * Get the average of the dataset's Y points
- *
- * @return var The Y-average across the dataset
- * @access private
- */
- function _averageY()
- {
- $posX = $this->_minimumX;
- $count = 0;
- $total = 0;
- while ($posX < $this->_maximumX) {
- $count ++;
- $total += $this->_getPointY($posX);
- $posX += $this->_stepX();
- }
-
- if ($count != 0) {
- return $total / $count;
- } else {
- return false;
- }
- }
-
- /**
- * Get the median of the array passed Y points
- *
- * @param array $data The data-array to get the median from
- * @param int $quartile The quartile to return the median from
- * @return var The Y-median across the dataset from the specified quartile
- * @access private
- */
- function _median($data, $quartile = 'second')
- {
- sort($data);
- $point = (count($data) - 1) / 2;
-
- if ($quartile == 'first') {
- $lowPoint = 0;
- $highPoint = floor($point);
- } elseif ($quartile == 'third') {
- $lowPoint = round($point);
- $highPoint = count($data) - 1;
- } else {
- $lowPoint = 0;
- $highPoint = count($data) - 1;
- }
-
- $point = ($lowPoint + $highPoint) / 2;
-
- if (floor($point) != $point) {
- $point = floor($point);
- return ($data[$point] + $data[($point + 1)]) / 2;
- } else {
- return $data[$point];
- }
- }
-
- /**
- * Get the median of the datasets Y points
- *
- * @param int $quartile The quartile to return the median from
- * @return var The Y-median across the dataset from the specified quartile
- * @access private
- */
- function _medianY($quartile = 'second')
- {
- $pointsY = array();
- $posX = $this->_minimumX;
- while ($posX <= $this->_maximumX) {
- $pointsY[] = $this->_getPointY($posX);
- $posX += $this->_stepX();
- }
- return $this->_median($pointsY, $quartile);
- }
-
-}
-?> \ No newline at end of file
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-26 19:13:58 +0000