The chart in the example is created by combining a line layer with a box-whisker layer.

The blue line and the yellow diamond symbols are from the line layer, creating using XYChart.addLineLayer2, Layer.addDataSet, and DataSet.setDataSymbol.

The brown error marks belong to the box-whisker layer, created using XYChart.addBoxWhiskerLayer. The data for the box and median parts of the box- whisker layer are set to empty arrays, so only the maximum and minimum marks are visible.

The maximum and minimum marks in this example is computed by adding/subtracting the error value to/from the data value using a ChartDirector utility class ArrayMath.

[File: phpdemo/errline.php".]

<?php require_once("../lib/phpchartdir.php"); #The data with error information $data = array(42, 49, 33, 38, 51, 46, 29, 41, 44, 57, 59, 52, 37, 34, 51, 56, 56, 60, 70, 76, 63, 67, 75, 64, 51); $errData = array(5, 6, 5.1, 6.5, 6.6, 8, 5.4, 5.1, 4.6, 5.0, 5.2, 6.0, 4.9, 5.6, 4.8, 6.2, 7.4, 7.1, 6.0, 6.6, 7.1, 5.3, 5.5, 7.9, 6.1); #The labels for the chart $labels = array("0", "-", "-", "3", "-", "-", "6", "-", "-", "9", "-", "-", "12", "-", "-", "15", "-", "-", "18", "-", "-", "21", "-", "-", "24"); #Create a XYChart object of size 600 x 300 pixels, with a light grey (0xc0c0c0) #background, a black border, and 1 pixel 3D border effect. $c = new XYChart(600, 300, 0xc0c0c0, 0, 1); #Set directory for loading images to current script directory #Need when running under Microsoft IIS $c->setSearchPath(dirname(__FILE__)); #Set the plotarea at (55, 45) and of size 520 x 205 pixels, with white #background. Turn on both horizontal and vertical grid lines with light grey #color (0xc0c0c0) $c->setPlotArea(55, 45, 520, 210, 0xffffff, -1, -1, 0xc0c0c0, 0xc0c0c0); #Add a title box to the chart using 13 pts Arial Bold Italic font. The title is #in CDML and includes embedded images for highlight. The text is white #(0xffffff) on a black background, with a 1 pixel 3D border. $titleObj = $c->addTitle( "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Molecular ". "Temperature Control <*img=star.png*><*img=star.png*><*/*>", "arialbi.ttf", 13, 0xffffff); $titleObj->setBackground(0x0, -1, 1); #Add a title to the y axis $c->yAxis->setTitle("Temperature"); #Add a title to the x axis using CMDL $c->xAxis->setTitle( "<*block,valign=absmiddle*><*img=clock.png*> Elapsed Time (hour)<*/*>"); #Set the labels on the x axis $c->xAxis->setLabels($labels); #Set the axes width to 2 pixels $c->xAxis->setWidth(2); $c->yAxis->setWidth(2); #Add a line layer to the chart $lineLayer = $c->addLineLayer2(); #Add a blue (0xff) data set to the line layer, with yellow (0xffff80) diamond #symbols $dataSetObj = $lineLayer->addDataSet($data, 0xff); $dataSetObj->setDataSymbol(DiamondSymbol, 12, 0xffff80); #Set the line width to 2 pixels $lineLayer->setLineWidth(2); #Add a box whisker layer to the chart. Use the upper and lower mark of the box #whisker layer to act as error zones. The upper and lower marks are computed #using the ArrayMath object. $upperMark = new ArrayMath($data); $upperMark->add($errData); $lowerMark = new ArrayMath($data); $lowerMark->sub($errData); $errLayer = $c->addBoxWhiskerLayer(null, null, $upperMark->result(), $lowerMark->result(), $data, Transparent, 0xbb6633); #Set the line width to 2 pixels $errLayer->setLineWidth(2); #Set the error zone to occupy half the space between the symbols $errLayer->setDataGap(0.5); #Add a custom CDML text at the bottom right of the plot area as the logo $textObj = $c->addText(575, 255, "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*>". "<*font=timesbi.ttf,size=10,color=804040*>Molecular\nEngineering<*/*>"); $textObj->setAlignment(BottomRight); #output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>