1 | <?php // content="text/plain; charset=utf-8" |
---|
2 | require_once ('jpgraph/jpgraph.php'); |
---|
3 | require_once ('jpgraph/jpgraph_line.php'); |
---|
4 | require_once ('jpgraph/jpgraph_bar.php'); |
---|
5 | |
---|
6 | function readsunspotdata($aFile, &$aYears, &$aSunspots) { |
---|
7 | $lines = @file($aFile,FILE_IGNORE_NEW_LINES|FILE_SKIP_EMPTY_LINES); |
---|
8 | if( $lines === false ) { |
---|
9 | throw new JpGraphException('Can not read sunspot data file.'); |
---|
10 | } |
---|
11 | foreach( $lines as $line => $datarow ) { |
---|
12 | $split = preg_split('/[\s]+/',$datarow); |
---|
13 | $aYears[] = substr(trim($split[0]),0,4); |
---|
14 | $aSunspots[] = trim($split[1]); |
---|
15 | } |
---|
16 | } |
---|
17 | |
---|
18 | $year = array(); |
---|
19 | $ydata = array(); |
---|
20 | readsunspotdata('yearssn.txt',$year,$ydata); |
---|
21 | |
---|
22 | // Just keep the last 20 values in the arrays |
---|
23 | $year = array_slice($year, -20); |
---|
24 | $ydata = array_slice($ydata, -20); |
---|
25 | |
---|
26 | // Width and height of the graph |
---|
27 | $width = 600; $height = 200; |
---|
28 | |
---|
29 | // Create a graph instance |
---|
30 | $graph = new Graph($width,$height); |
---|
31 | |
---|
32 | // Specify what scale we want to use, |
---|
33 | // text = txt scale for the X-axis |
---|
34 | // int = integer scale for the Y-axis |
---|
35 | $graph->SetScale('textint'); |
---|
36 | |
---|
37 | // Setup a title for the graph |
---|
38 | $graph->title->Set('Sunspot example'); |
---|
39 | |
---|
40 | // Setup titles and X-axis labels |
---|
41 | $graph->xaxis->title->Set('(year)'); |
---|
42 | $graph->xaxis->SetTickLabels($year); |
---|
43 | |
---|
44 | // Setup Y-axis title |
---|
45 | $graph->yaxis->title->Set('(# sunspots)'); |
---|
46 | |
---|
47 | // Create the bar plot |
---|
48 | $barplot=new BarPlot($ydata); |
---|
49 | |
---|
50 | // Add the plot to the graph |
---|
51 | $graph->Add($barplot); |
---|
52 | |
---|
53 | // Display the graph |
---|
54 | $graph->Stroke(); |
---|
55 | |
---|
56 | ?> |
---|