1 | <?php |
---|
2 | /** |
---|
3 | * Copyright (C) 2000 Afan Ottenheimer. Released under |
---|
4 | * the GPL and PHP licenses as stated in the the README file which |
---|
5 | * should have been included with this document. |
---|
6 | |
---|
7 | * This is an subclass for phplot.php and should only be |
---|
8 | * called after phplot.ini has been called. This extends |
---|
9 | * phplot by adding additional routines that can be used |
---|
10 | * to modify the data arrays. |
---|
11 | * |
---|
12 | * Data must be a *numerical* array, this is enforced in SetDataValues() |
---|
13 | * @package Workflow |
---|
14 | * @subpackage phplot |
---|
15 | */ |
---|
16 | |
---|
17 | require_once("phplot.php"); |
---|
18 | |
---|
19 | class PHPlot_Data extends PHPlot |
---|
20 | { |
---|
21 | /*! |
---|
22 | * Constructor |
---|
23 | */ |
---|
24 | function PHPlot_Data($which_width=600, $which_height=400, $which_output_file=NULL, $which_input_file=NULL) |
---|
25 | { |
---|
26 | if (! isset($this->img)) { |
---|
27 | $this->PHPlot($which_width, $which_height, $which_output_file, $which_input_file); |
---|
28 | } |
---|
29 | } |
---|
30 | |
---|
31 | /*! |
---|
32 | * Will scale all data rows |
---|
33 | * Maybe later I will do a function that only scales some rows |
---|
34 | * if $even is TRUE, data will be scaled with "even" factors. |
---|
35 | * \note Original code by Thiemo Nagel |
---|
36 | */ |
---|
37 | function DoScaleData($even, $show_in_legend) |
---|
38 | { |
---|
39 | $offset = 0; // We use this not to read labels in text-data |
---|
40 | |
---|
41 | if ($this->data_type == 'text-data') { |
---|
42 | $offset = 1; |
---|
43 | } elseif ($this->data_type != 'data-data') { |
---|
44 | $this->DrawError('wrong data type!!'); |
---|
45 | return FALSE; |
---|
46 | } |
---|
47 | |
---|
48 | // Determine maxima for each data row in array $max |
---|
49 | // Put maximum of the maxima in $maxmax |
---|
50 | $maxmax = 0; |
---|
51 | for($i=0; $i < $this->num_data_rows; ++$i) { |
---|
52 | $rowsize = count($this->data[$i]); |
---|
53 | for ($j=$offset; $j < $rowsize; ++$j) { |
---|
54 | if ($this->data[$i][$j] > @ $max[$j]) |
---|
55 | $max[$j] = $this->data[$i][$j]; |
---|
56 | if (@ $max[$j] > $maxmax) |
---|
57 | $maxmax = $max[$j]; |
---|
58 | } |
---|
59 | } |
---|
60 | |
---|
61 | // determine amplification factor $amplify |
---|
62 | $end = count($max) + $offset; |
---|
63 | for ($i=$offset; $i < $end; ++$i) { |
---|
64 | if ($max[$i] == 0 || $max[$i] == $maxmax) { |
---|
65 | $amplify[$i] = 1; // no divide by zero |
---|
66 | } else { |
---|
67 | if ($even) { |
---|
68 | $amp = pow(10,round(log10($maxmax / $max[$i]))-1); |
---|
69 | if ($amp * $max[$i] * 5 < $maxmax) { |
---|
70 | $amp *= 5; |
---|
71 | } elseif ($amp * $max[$i] * 2 < $maxmax) { |
---|
72 | $amp *= 2; |
---|
73 | } |
---|
74 | } else { |
---|
75 | $amp = $maxmax / $max[$i]; |
---|
76 | $digits = floor(log10($amp)); |
---|
77 | $amp = round($amp/pow(10,$digits-1))*pow(10,$digits-1); |
---|
78 | } |
---|
79 | $amplify[$i] = $amp; |
---|
80 | } |
---|
81 | if ($amplify[$i] != 1 && $show_in_legend) |
---|
82 | @ $this->legend[$i] .= "*$amplify[$i]"; |
---|
83 | } |
---|
84 | |
---|
85 | // Amplify data |
---|
86 | // On my machine, running 1000 iterations over 1000 rows of 12 elements each, |
---|
87 | // the for loops were 43.2% faster (MBD) |
---|
88 | for ($i = 0; $i < $this->num_data_rows; ++$i) { |
---|
89 | $rowsize = count($this->data[$i]); |
---|
90 | for ($j=$offset; $j < $rowsize; ++$j) { |
---|
91 | $this->data[$i][$j] *= $amplify[$j]; |
---|
92 | } |
---|
93 | } |
---|
94 | |
---|
95 | //Re-Scale Vertical Ticks if not already set |
---|
96 | if ( ! $this->y_tick_increment) { |
---|
97 | $this->SetYTickIncrement() ; |
---|
98 | } |
---|
99 | |
---|
100 | return TRUE; |
---|
101 | } //function DoScaleData |
---|
102 | |
---|
103 | |
---|
104 | /*! |
---|
105 | * Computes a moving average of strength $interval for |
---|
106 | * data row number $datarow, where 0 denotes the first |
---|
107 | * row of y-data. |
---|
108 | * |
---|
109 | * \param int datarow Index of the row whereupon to make calculations |
---|
110 | * \param int interval Number of elements to use in average ("strength") |
---|
111 | * \param bool show Whether to tell about the moving average in the legend. |
---|
112 | * \param string color Color for the line to be drawn. This color is darkened. |
---|
113 | * Can be named or #RRGGBB. |
---|
114 | * \param int width Width of the line to be drawn. |
---|
115 | * |
---|
116 | * \note Original idea by Theimo Nagel |
---|
117 | */ |
---|
118 | function DoMovingAverage($datarow, $interval, $show=TRUE, $color=NULL, $width=NULL) |
---|
119 | { |
---|
120 | $off = 1; // Skip record #0 (data label) |
---|
121 | |
---|
122 | $this->PadArrays(); |
---|
123 | |
---|
124 | if ($interval == 0) { |
---|
125 | $this->DrawError('DoMovingAverage(): interval can\'t be 0'); |
---|
126 | return FALSE; |
---|
127 | } |
---|
128 | |
---|
129 | if ($datarow >= $this->records_per_group) { |
---|
130 | $this->DrawError("DoMovingAverage(): Data row out of bounds ($datarow >= $this->records_per_group)"); |
---|
131 | return FALSE; |
---|
132 | } |
---|
133 | |
---|
134 | if ($this->data_type == 'text-data') { |
---|
135 | // Ok. No need to set the offset to skip more records. |
---|
136 | } elseif ($this->data_type == 'data-data') { |
---|
137 | ++$off; // first Y value at $data[][2] |
---|
138 | } else { |
---|
139 | $this->DrawError('DoMovingAverage(): wrong data type!!'); |
---|
140 | return FALSE; |
---|
141 | } |
---|
142 | |
---|
143 | // Set color: |
---|
144 | if ($color) { |
---|
145 | array_push($this->ndx_data_colors, $this->SetIndexDarkColor($color)); |
---|
146 | } else { |
---|
147 | array_push($this->ndx_data_colors, $this->SetIndexDarkColor($this->data_colors[$datarow])); |
---|
148 | } |
---|
149 | // Set line width: |
---|
150 | if ($width) { |
---|
151 | array_push($this->line_widths, $width); |
---|
152 | } else { |
---|
153 | array_push($this->line_widths, $this->line_widths[$datarow] * 2); |
---|
154 | } |
---|
155 | // Show in legend? |
---|
156 | if ($show) { |
---|
157 | $this->legend[$this->records_per_group-1] = "(MA[$datarow]:$interval)"; |
---|
158 | } |
---|
159 | |
---|
160 | $datarow += $off; |
---|
161 | for ($i = 0; $i < $this->num_data_rows; ++$i) { |
---|
162 | $storage[$i % $interval] = @ $this->data[$i][$datarow]; |
---|
163 | $ma = array_sum($storage); |
---|
164 | $ma /= count($storage); |
---|
165 | array_push($this->data[$i], $ma); // Push the data onto the array |
---|
166 | $this->num_recs[$i]++; // Tell the drawing functions it is there |
---|
167 | } |
---|
168 | $this->records_per_group++; |
---|
169 | // $this->FindDataLimits(); |
---|
170 | return TRUE; |
---|
171 | } //function DoMovingAverage() |
---|
172 | |
---|
173 | |
---|
174 | /** |
---|
175 | * Computes an exponentially smoothed moving average. |
---|
176 | * @param int perc "smoothing percentage" |
---|
177 | * FIXME!!! I haven't checked this. |
---|
178 | */ |
---|
179 | function DoExponentialMovingAverage($datarow, $perc, $show_in_legend) |
---|
180 | { |
---|
181 | if ($this->data_type == 'text-data') { |
---|
182 | ++$datarow; |
---|
183 | } elseif ($this->data_type != 'data-data') { |
---|
184 | $this->DrawError('DoWeightedMovingAverage(): wrong data type!!'); |
---|
185 | return FALSE; |
---|
186 | } |
---|
187 | |
---|
188 | if ($show_in_legend) { |
---|
189 | $this->legend[$datarow] .= " (MA: $interval)"; |
---|
190 | } |
---|
191 | |
---|
192 | $storage[0] = $this->data[0][$datarow]; |
---|
193 | for ($i=1;$i < $this->num_data_rows; ++$i) { |
---|
194 | $storage[$i] = @ $storage[$i-1] + $perc * ($this->data[$i][$datarow] - $storage[$i-1]); |
---|
195 | $ma = array_sum($storage); |
---|
196 | $ma /= count($storage); |
---|
197 | $this->data[$i][$datarow] = $ma; |
---|
198 | } |
---|
199 | return TRUE; |
---|
200 | } // function DoExponentialMovingAverage() |
---|
201 | |
---|
202 | |
---|
203 | /*! |
---|
204 | * Removes the DataSet of number $index |
---|
205 | */ |
---|
206 | function DoRemoveDataSet($index) |
---|
207 | { |
---|
208 | $offset = 1; |
---|
209 | if ($this->data_type == 'data-data') { |
---|
210 | ++$offset; |
---|
211 | } elseif ($this->data_type != 'text-data') { |
---|
212 | $this->DrawError('wrong data type!!'); |
---|
213 | return FALSE; |
---|
214 | } |
---|
215 | |
---|
216 | $index += $offset; |
---|
217 | foreach ($this->data as $key=>$val) { |
---|
218 | foreach ($val as $key2=>$val2) { |
---|
219 | if ($key2 >= $index) { |
---|
220 | if (isset($this->data[$key][$key2+1])) { |
---|
221 | $this->data[$key][$key2] = $this->data[$key][$key2+1]; |
---|
222 | } else { |
---|
223 | unset($this->data[$key][$key2]); |
---|
224 | } |
---|
225 | } |
---|
226 | } |
---|
227 | } |
---|
228 | } // function DoRemoveDataSet |
---|
229 | |
---|
230 | |
---|
231 | /*! |
---|
232 | * Computes row x divided by row y, stores the result in row x |
---|
233 | * and deletes row y |
---|
234 | */ |
---|
235 | function DoDivision($x,$y) |
---|
236 | { |
---|
237 | $offset = 1; |
---|
238 | if ($this->data_type == 'data-data') { |
---|
239 | ++$offset; |
---|
240 | } elseif ($this->data_type != 'text-data') { |
---|
241 | $this->DrawError('wrong data type!!'); |
---|
242 | return FALSE; |
---|
243 | } |
---|
244 | |
---|
245 | $x += $offset; $y += $offset; |
---|
246 | reset($this->data); |
---|
247 | while (list($key, $val) = each($this->data)) { |
---|
248 | if ($this->data[$key][$y] == 0) { |
---|
249 | $this->data[$key][$x] = 0; |
---|
250 | } else { |
---|
251 | $this->data[$key][$x] /= $this->data[$key][$y]; |
---|
252 | } |
---|
253 | } |
---|
254 | |
---|
255 | $this->DoRemoveDataSet($y-$offset); |
---|
256 | } // function DoDivision |
---|
257 | |
---|
258 | } // class PHPlot_Data extends PHPlot |
---|
259 | ?> |
---|