ChartDirector 7.0 (PHP Edition)

Rotated Line Chart




This example demonstrates swapping the x and y axes to produce a rotated line chart in which the line goes from top to bottom (instead of left to right).

The x and y axes in the example are configured as follows:

For demo purposes, this example uses RanTable to simulate a database table with 4 columns, in which one is a date/time column and the remaining three are data columns. The date/time column is passed to ChartDirector as the x values using Layer.setXData, while the data columns are passed to ChartDirector as y values using Layer.addDataSet.

Source Code Listing

[File: phpdemo/rotatedline.php]
<?php require_once("../lib/phpchartdir.php"); # # We use a random table to simulate generating 12 months of data # # Create the random table object with 4 cols * 12 rows, using 3 as seed $rantable = new RanTable(3, 4, 12); # Set the 1st column to be the 12 months of year 2002 $rantable->setDateCol(0, chartTime(2002, 1, 1), 86400 * 30); # Set the 2nd, 3rd and 4th columns to be random numbers starting from 125, 75, and 100 respectively. # The change between rows is set to -35 to + 35. The minimum value of any cell is 0. $rantable->setCol(1, 125, -35, 35, 0); $rantable->setCol(2, 75, -35, 35, 0); $rantable->setCol(3, 100, -35, 35, 0); # Get the 1st column (time) as the x data $dataX = $rantable->getCol(0); # Get the 2nd, 3rd and 4th columns as 3 data sets $dataY0 = $rantable->getCol(1); $dataY1 = $rantable->getCol(2); $dataY2 = $rantable->getCol(3); # Create a XYChart object of size 360 x 400 pixels $c = new XYChart(360, 400); # Add a title to the chart $c->addTitle("<*underline=2*>Rotated Line Chart Demo", "Times New Roman Bold Italic", 14); # Set the plotarea at (60, 75) and of size 190 x 320 pixels. Turn on both horizontal and vertical # grid lines with light grey color (0xc0c0c0) $c->setPlotArea(60, 75, 190, 320)->setGridColor(0xc0c0c0, 0xc0c0c0); # Add a legend box at (270, 75) $c->addLegend(270, 75); # Swap the x and y axis to become a rotated chart $c->swapXY(); # Set the y axis on the top side (right + rotated = top) $c->setYAxisOnRight(); # Add a title to the y axis $c->yAxis->setTitle("Throughput (MBytes)"); # Reverse the x axis so it is pointing downwards $c->xAxis->setReverse(); # Add a line chart layer using the given data $layer = $c->addLineLayer2(); $layer->setXData($dataX); $layer->addDataSet($dataY0, 0xff0000, "Server A"); $layer->addDataSet($dataY1, 0x338033, "Server B"); $layer->addDataSet($dataY2, 0x0000ff, "Server C"); # Set the line width to 2 pixels $layer->setLineWidth(2); # Output the chart $viewer = new WebChartViewer("chart1"); $viewer->setChart($c, SVG); # Include tool tip for the chart $viewer->setImageMap($c->getHTMLImageMap("", "", "title='[{dataSetName}] {x|mm/yyyy}: {value|0} MByte'")); ?> <!DOCTYPE html> <html> <head> <title>Rotated Line Chart</title> <!-- Include ChartDirector Javascript Library to support chart interactions --> <script type="text/javascript" src="cdjcv.js"></script> </head> <body style="margin:5px 0px 0px 5px"> <div style="font:bold 18pt verdana;"> Rotated Line Chart </div> <hr style="border:solid 1px #000080; background:#000080" /> <div style="font:10pt verdana; margin-bottom:1.5em"> <a href="viewsource.php?file=<?=basename(__FILE__)?>">View Chart Source Code</a> </div> <!-- ****** Here is the chart image ****** --> <?php echo $viewer->renderHTML(); ?> </body> </html>