<?php // content="text/plain; charset=utf-8" require_once ('jpgraph/jpgraph.php'); require_once ('jpgraph/jpgraph_line.php'); require_once ('jpgraph/jpgraph_bar.php'); function toFahrenheit($aVal) { return round(($aVal*9/5)+32,2); } function toCelcius($aVal) { return round(($aVal-32)*5/9,2); } $datay =array(2,3,8,19,7,17,6,22); // Create the graph. $graph = new Graph(400,280); // Slightly bigger margins than default to make room for titles $graph->SetMargin(50,60,40,45); $graph->SetMarginColor('white'); // Setup the scales for X,Y and Y2 axis $graph->SetScale("textlin"); // X and Y axis $graph->SetY2Scale("lin"); // Y2 axis // Overall graph title $graph->title->Set('Synchronized Y & Y2 scales'); $graph->title->SetFont(FF_ARIAL,FS_BOLD,12); // Title for X-axis $graph->xaxis->title->Set('Measurement'); $graph->xaxis->title->SetMargin(5); $graph->xaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11); // Create Y data set $lplot = new BarPlot($datay); $graph->yaxis->title->Set('Celcius (C)'); $graph->yaxis->title->SetMargin(5); $graph->yaxis->title->SetFont(FF_ARIAL,FS_NORMAL,11); // ... and add the plot to the Y-axis $graph->Add($lplot); // Create Y2 scale data set $l2plot = new LinePlot($datay); $l2plot->SetWeight(0); $graph->y2axis->title->Set('Fahrenheit (F)'); $graph->y2axis->title->SetMargin(5); // Some extra margin to clear labels $graph->y2axis->title->SetFont(FF_ARIAL,FS_NORMAL,11); $graph->y2axis->SetLabelFormatCallback('toFahrenheit'); $graph->y2axis->SetColor('navy'); // ... and add the plot to the Y2-axis $graph->AddY2($l2plot); $graph->Stroke(); ?>