[42] | 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 | |
---|
| 7 | function toFahrenheit($aVal) { |
---|
| 8 | return round(($aVal*9/5)+32,2); |
---|
| 9 | } |
---|
| 10 | |
---|
| 11 | function toCelcius($aVal) { |
---|
| 12 | return round(($aVal-32)*5/9,2); |
---|
| 13 | } |
---|
| 14 | |
---|
| 15 | |
---|
| 16 | $datay =array(2,3,8,19,7,17,6,22); |
---|
| 17 | |
---|
| 18 | // Create the graph. |
---|
| 19 | $graph = new Graph(400,280); |
---|
| 20 | |
---|
| 21 | // Slightly bigger margins than default to make room for titles |
---|
| 22 | $graph->SetMargin(50,60,40,45); |
---|
| 23 | $graph->SetMarginColor('white'); |
---|
| 24 | |
---|
| 25 | |
---|
| 26 | // Setup the scales for X,Y and Y2 axis |
---|
| 27 | $graph->SetScale("intlin"); // X and Y axis |
---|
| 28 | $graph->SetY2Scale("lin"); // Y2 axis |
---|
| 29 | |
---|
| 30 | // Overall graph title |
---|
| 31 | $graph->title->Set('Synchronized Y & Y2 scales'); |
---|
| 32 | $graph->title->SetFont(FF_ARIAL,FS_BOLD,12); |
---|
| 33 | |
---|
| 34 | // Title for X-axis |
---|
| 35 | $graph->xaxis->title->Set('Measurement'); |
---|
| 36 | $graph->xaxis->title->SetMargin(5); |
---|
| 37 | $graph->xaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11); |
---|
| 38 | |
---|
| 39 | // Create Y data set |
---|
| 40 | $lplot = new LinePlot($datay); |
---|
| 41 | $graph->yaxis->title->Set('Celcius (C)'); |
---|
| 42 | $graph->yaxis->title->SetMargin(5); |
---|
| 43 | $graph->yaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11); |
---|
| 44 | // ... and add the plot to the Y-axis |
---|
| 45 | $graph->Add($lplot); |
---|
| 46 | |
---|
| 47 | // Create Y2 scale data set |
---|
| 48 | $l2plot = new LinePlot($datay); |
---|
| 49 | $l2plot->SetWeight(0); |
---|
| 50 | $graph->y2axis->title->Set('Fahrenheit (F)'); |
---|
| 51 | $graph->y2axis->title->SetMargin(5); // Some extra margin to clear labels |
---|
| 52 | $graph->y2axis->title->SetFont(FF_ARIAL,FS_NORMAL,11); |
---|
| 53 | $graph->y2axis->SetLabelFormatCallback('toFahrenheit'); |
---|
| 54 | $graph->y2axis->SetColor('navy'); |
---|
| 55 | |
---|
| 56 | // ... and add the plot to the Y2-axis |
---|
| 57 | $graph->AddY2($l2plot); |
---|
| 58 | |
---|
| 59 | $graph->Stroke(); |
---|
| 60 | ?> |
---|