This example demostrates drawing a line chart with arbitrary x coordinates (not monotonically increasing or decreasing). The x values of the data points are passed to ChartDirector using Layer.setXData.

Note this chart contains labels for the start and end points of the line. They are created using Layer.addCustomDataLabel.

[File: phpdemo/xyline.php".]

<?php require_once("../lib/phpchartdir.php"); #The (x, y) data for the first line $dataX0 = array(20, 90, 40, 30, 12); $dataY0 = array(10, 40, 75, 54, 20); #The (x, y) data for the second line $dataX1 = array(10, 40, 75, 54, 60); $dataY1 = array(50, 90, 40, 30, 10); #Create a XYChart object of size 450 x 450 pixels $c = new XYChart(450, 450); #Set the plotarea at (55, 65) and of size 350 x 300 pixels, with white #background and a light grey border (0xc0c0c0). Turn on both horizontal and #vertical grid lines with light grey color (0xc0c0c0) $c->setPlotArea(55, 65, 350, 300, 0xffffff, -1, 0xc0c0c0, 0xc0c0c0, -1); #Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12 #pts Times Bold Italic font. Set the background and border color to Transparent. $legendObj = $c->addLegend(50, 30, false, "timesbi.ttf", 12); $legendObj->setBackground(Transparent); #Add a title to the chart using 18 pts Times Bold Itatic font $c->addTitle("Reaction Path", "timesbi.ttf", 18); #Add a title to the y axis using 12 pts Arial Bold Italic font $c->yAxis->setTitle("Temperature (Celcius)", "arialbi.ttf", 12); #Set the y axis line width to 3 pixels $c->yAxis->setWidth(3); #Add a title to the x axis using 12 pts Arial Bold Italic font $c->xAxis->setTitle("Pressure (Pa)", "arialbi.ttf", 12); #Set the x axis line width to 3 pixels $c->xAxis->setWidth(3); #Add a red (0xff3333) line layer using dataX0 and dataY0 $layer1 = $c->addLineLayer($dataY0, 0xff3333, "Compound AAA"); $layer1->setXData($dataX0); #Set the line width to 3 pixels $layer1->setLineWidth(3); #Use 9 pixel square symbols for the data points $getDataSetObj = $layer1->getDataSet(0); $getDataSetObj->setDataSymbol(SquareSymbol, 9); #Add custom text labels to the first and last point on the scatter plot using #Arial Bold font $layer1->addCustomDataLabel(0, 0, "Start", "arialbd.ttf"); $layer1->addCustomDataLabel(0, 4, "End", "arialbd.ttf"); #Add a green (0x33ff33) line layer using dataX1 and dataY1 $layer2 = $c->addLineLayer($dataY1, 0x33ff33, "Compound BBB"); $layer2->setXData($dataX1); #Set the line width to 3 pixels $layer2->setLineWidth(3); #Use 11 pixel diamond symbols for the data points $getDataSetObj = $layer2->getDataSet(0); $getDataSetObj->setDataSymbol(DiamondSymbol, 11); #Add custom text labels to the first and last point on the scatter plot using #Arial Bold font $layer2->addCustomDataLabel(0, 0, "Start", "arialbd.ttf"); $layer2->addCustomDataLabel(0, 4, "End", "arialbd.ttf"); #output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>