251 lines
8 KiB
PHP
251 lines
8 KiB
PHP
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<?php
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/*=======================================================================
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// File: JPGRAPH_UTILS.INC
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// Description: Collection of non-essential "nice to have" utilities
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// Created: 2005-11-20
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// Author: Johan Persson (johanp@aditus.nu)
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// Ver: $Id: jpgraph_utils.inc,v 1.1 2006/07/07 13:37:14 powles Exp $
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//
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// Copyright (c) Aditus Consulting. All rights reserved.
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//========================================================================
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*/
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//===================================================
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// CLASS FuncGenerator
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// Description: Utility class to help generate data for function plots.
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// The class supports both parametric and regular functions.
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//===================================================
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class FuncGenerator {
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var $iFunc='',$iXFunc='',$iMin,$iMax,$iStepSize;
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function FuncGenerator($aFunc,$aXFunc='') {
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$this->iFunc = $aFunc;
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$this->iXFunc = $aXFunc;
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}
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function E($aXMin,$aXMax,$aSteps=50) {
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$this->iMin = $aXMin;
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$this->iMax = $aXMax;
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$this->iStepSize = ($aXMax-$aXMin)/$aSteps;
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if( $this->iXFunc != '' )
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$t = 'for($i='.$aXMin.'; $i<='.$aXMax.'; $i += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]='.$this->iXFunc.';}';
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elseif( $this->iFunc != '' )
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$t = 'for($x='.$aXMin.'; $x<='.$aXMax.'; $x += '.$this->iStepSize.') {$ya[]='.$this->iFunc.';$xa[]=$x;} $x='.$aXMax.';$ya[]='.$this->iFunc.';$xa[]=$x;';
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else
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JpGraphError::RaiseL(24001);//('FuncGenerator : No function specified. ');
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@eval($t);
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// If there is an error in the function specifcation this is the only
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// way we can discover that.
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if( empty($xa) || empty($ya) )
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JpGraphError::RaiseL(24002);//('FuncGenerator : Syntax error in function specification ');
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return array($xa,$ya);
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}
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}
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//=============================================================================
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// CLASS SymChar
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// Description: Code values for some commonly used characters that
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// normally isn't available directly on the keyboard, for example
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// mathematical and greek symbols.
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//=============================================================================
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class SymChar {
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function Get($aSymb,$aCapital=FALSE) {
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static $iSymbols = array(
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/* Greek */
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array('alpha','03B1','0391'),
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array('beta','03B2','0392'),
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array('gamma','03B3','0393'),
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array('delta','03B4','0394'),
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array('epsilon','03B5','0395'),
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array('zeta','03B6','0396'),
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array('ny','03B7','0397'),
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array('eta','03B8','0398'),
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array('theta','03B8','0398'),
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array('iota','03B9','0399'),
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array('kappa','03BA','039A'),
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array('lambda','03BB','039B'),
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array('mu','03BC','039C'),
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array('nu','03BD','039D'),
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array('xi','03BE','039E'),
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array('omicron','03BF','039F'),
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array('pi','03C0','03A0'),
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array('rho','03C1','03A1'),
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array('sigma','03C3','03A3'),
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array('tau','03C4','03A4'),
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array('upsilon','03C5','03A5'),
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array('phi','03C6','03A6'),
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array('chi','03C7','03A7'),
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array('psi','03C8','03A8'),
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array('omega','03C9','03A9'),
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/* Money */
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array('euro','20AC'),
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array('yen','00A5'),
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array('pound','20A4'),
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/* Math */
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array('approx','2248'),
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array('neq','2260'),
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array('not','2310'),
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array('def','2261'),
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array('inf','221E'),
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array('sqrt','221A'),
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array('int','222B'),
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/* Misc */
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array('copy','00A9'),
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array('para','00A7'));
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$n = count($iSymbols);
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$i=0;
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$found = false;
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$aSymb = strtolower($aSymb);
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while( $i < $n && !$found ) {
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$found = $aSymb === $iSymbols[$i++][0];
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}
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if( $found ) {
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$ca = $iSymbols[--$i];
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if( $aCapital && count($ca)==3 )
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$s = $ca[2];
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else
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$s = $ca[1];
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return sprintf('&#%04d;',hexdec($s));
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}
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else
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return '';
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}
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}
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//=============================================================================
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// CLASS DateScaleUtils
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// Description: Help to create a manual date scale
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//=============================================================================
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DEFINE('DSUTILS_MONTH1',1); // Major and minor ticks on a monthly basis
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class DateScaleUtils {
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function GetTicks($aData,$aType=1) {
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//
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// Find out the range of the data in order to get the limits for the loops
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// that creates the position for the labels. This code is generic and can be
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// used for any ranges of the data.
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//
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$n = count($aData);
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$startmonth = date('n',$aData[0]);
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$startday = date('j',$aData[0]);
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$startyear = date('Y',$aData[0]);
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$endmonth = date('n',$aData[$n-1]);
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$endyear = date('Y',$aData[$n-1]);
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$endday = date('j',$aData[$n-1]);
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//
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// Now create the positions for all the ticks. In this example we
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// put a tick at the start of every month and also on the very
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// first and last X-position.
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//
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$tickPositions = array();
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$minTickPositions = array();
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$i=0;$j=0;
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// Uncomment this line to put a label at the very left data pos
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// $tickPositions[$i++] = $datax[0];
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$m = $startmonth;
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$y = $startyear;
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// Skip the first month label if it is before the startdate
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if( $startday == 1 ) {
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$tickPositions[$i++] = mktime(0,0,0,$m,1,$y);
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}
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if( $startday < 15 ) {
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$minTickPositions[$j++] = mktime(0,0,0,$m,15,$y);
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}
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++$m;
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// Loop through all the years included in the scale
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for($y=$startyear; $y <= $endyear; ++$y ) {
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// Loop through all the months. There are three cases to consider:
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// 1. We are in the first year and must start with the startmonth
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// 2. We are in the end year and we must stop at last month of the scale
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// 3. A year in between where we run through all the 12 months
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$stopmonth = $y == $endyear ? $endmonth : 12;
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while( $m <= $stopmonth ) {
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switch( $aType ) {
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case 1:
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// Set minor tick at the middle of the month
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if( $m <= $stopmonth ) {
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if( !($y==$endyear && $m==$stopmonth && $endday < 15) )
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$minTickPositions[$j++] = mktime(0,0,0,$m,15,$y);
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}
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// Major at month
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// Get timestamp of first hour of first day in each month
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$tickPositions[$i++] = mktime(0,0,0,$m,1,$y);
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break;
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}
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++$m;
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}
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$m=1;
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}
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// For the case where all dates are within the same month
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// we want to make sure we have at least two ticks on the scale
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// since the scale want work properly otherwise
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if($startmonth == $endmonth && $startyear == $endyear && $aType==1 ) {
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$tickPositions[$i++] = mktime(0 ,0 ,0, $startmonth + 1, 1, $startyear);
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}
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// Uncomment this line to put a label at the very right data pos
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// $tickPositions[$i] = $datax[$n-1];
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return array($tickPositions,$minTickPositions);
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}
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}
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//=============================================================================
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// Class ReadFileData
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//=============================================================================
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Class ReadFileData {
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//----------------------------------------------------------------------------
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// Desciption:
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// Read numeric data from a file.
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// Each value should be separated by either a new line or by a specified
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// separator character (default is ',').
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// Before returning the data each value is converted to a proper float
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// value. The routine is robust in the sense that non numeric data in the
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// file will be discarded.
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//
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// Returns:
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// The number of data values read on success, FALSE on failure
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//----------------------------------------------------------------------------
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function FromCSV($aFile,&$aData,$aSepChar=',',$aMaxLineLength=1024) {
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$rh = fopen($aFile,'r');
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if( $rh === false )
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return false;
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$tmp = array();
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$lineofdata = fgetcsv($rh, 1000, ',');
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while ( $lineofdata !== FALSE) {
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$tmp = array_merge($tmp,$lineofdata);
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$lineofdata = fgetcsv($rh, $aMaxLineLength, $aSepChar);
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}
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fclose($rh);
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// Now make sure that all data is numeric. By default
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// all data is read as strings
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$n = count($tmp);
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$aData = array();
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$cnt=0;
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for($i=0; $i < $n; ++$i) {
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if( $tmp[$i] !== "" ) {
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$aData[$cnt++] = floatval($tmp[$i]);
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}
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}
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return $cnt;
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}
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}
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?>
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