Created
January 6, 2013 10:51
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Graph for volts logging
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| <html> | |
| <head> | |
| <script type="text/javascript" src="https://www.google.com/jsapi"></script> | |
| <script type="text/javascript"> | |
| google.load("visualization", "1", {packages:["annotatedtimeline"]}); | |
| google.setOnLoadCallback(drawChart); | |
| function drawChart() { | |
| var data = new google.visualization.DataTable(); | |
| data.addColumn('date', 'Time'); | |
| data.addColumn('number', 'Volts'); | |
| <?php | |
| $row = 1; | |
| if (($handle = fopen("/home/mwheeler/scripts/volts.csv", "r")) !== FALSE) { | |
| while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) { | |
| $num = count($data); | |
| $row++; | |
| for ($c=0; $c < $num; $c++) { | |
| if ($c==0){ | |
| $timestamp = $data[$c] * 1000; | |
| } else if ($c==1) { | |
| $a = str_replace(" V", "", $data[$c]); | |
| if ($a>0) { | |
| $volt = $a; | |
| } | |
| } | |
| if ($volt & $timestamp){ | |
| $volts[$timestamp] = $volt ; | |
| } | |
| } | |
| } | |
| fclose($handle); | |
| } | |
| echo "data.addRows(["; | |
| $first = false; | |
| foreach ($volts as $k => $v) { | |
| if ($first == false){ | |
| echo "[new Date(".$k."),".$v."]\n"; | |
| $first = true; | |
| } | |
| else { | |
| echo ",[new Date(".$k."),".$v."]\n"; | |
| } | |
| } | |
| echo "]);\n"; | |
| ?> | |
| var chart = new google.visualization.AnnotatedTimeLine(document.getElementById('chart_div')); | |
| chart.draw(data, {dateFormat: 'HH:mm MMMM dd, yyyy'}); | |
| } | |
| </script> | |
| </head> | |
| <body> | |
| <div id='chart_div' style='width: 1000px; height: 400px;'></div> | |
| </body> | |
| </html> |
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