ChartDirector Ver 3.1 (PHP Edition Edition)

Bubble XY Scaling




In ChartDirector, a bubble chart in general is a scatter layer with the symbol sizes controlled by some other data series.

ChartDirector supports using arbitrary symbols as bubbles. Thus bubble shape is not limited to circle but can be any shapes.

Furthermore, ChartDirector supports independent x and y sizes for bubbles. This is useful for creating charts in which the bubbles reflect some features of the data points, such as its confidence zone, x and y errors, x and y standard deviations, etc.

Source Code Listing

[File: phpdemo/bubblescale.php".]
<?php require_once("../lib/phpchartdir.php"); #The XY points for the bubble chart. The bubble chart has independent bubble #size on the X and Y direction. $dataX0 = array(1000, 1500, 1700); $dataY0 = array(25, 20, 65); $dataZX0 = array(500, 200, 600); $dataZY0 = array(15, 30, 20); $dataX1 = array(500, 1000, 1300); $dataY1 = array(35, 50, 75); $dataZX1 = array(800, 300, 500); $dataZY1 = array(8, 27, 25); $dataX2 = array(150, 300); $dataY2 = array(20, 60); $dataZX2 = array(160, 400); $dataZY2 = array(30, 20); #Create a XYChart object of size 450 x 420 pixels $c = new XYChart(450, 420); #Set the plotarea at (55, 65) and of size 350 x 300 pixels, with a light grey #border (0xc0c0c0). Turn on both horizontal and vertical grid lines with light #grey color (0xc0c0c0) $c->setPlotArea(55, 65, 350, 300, -1, -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("Plasma Battery Comparison", "timesbi.ttf", 18); #Add titles to the axes using 12 pts Arial Bold Italic font $c->yAxis->setTitle("Operating Current", "arialbi.ttf", 12); $c->xAxis->setTitle("Operating Voltage", "arialbi.ttf", 12); #Set the axes line width to 3 pixels $c->xAxis->setWidth(3); $c->yAxis->setWidth(3); #Add (dataX0, dataY0) as a standard scatter layer, and also as a "bubble" #scatter layer, using circles as symbols. The "bubble" scatter layer has symbol #size modulated by (dataZX0, dataZY0) using the scale on the x and y axes. $c->addScatterLayer($dataX0, $dataY0, "Vendor A", CircleSymbol, 9, 0xff3333, 0xff3333); $scatterLayerObj = $c->addScatterLayer($dataX0, $dataY0, "", CircleSymbol, 9, 0x80ff3333, 0x80ff3333); $scatterLayerObj->setSymbolScale($dataZX0, XAxisScale, $dataZY0, YAxisScale); #Add (dataX1, dataY1) as a standard scatter layer, and also as a "bubble" #scatter layer, using squares as symbols. The "bubble" scatter layer has symbol #size modulated by (dataZX1, dataZY1) using the scale on the x and y axes. $c->addScatterLayer($dataX1, $dataY1, "Vendor B", SquareSymbol, 7, 0x3333ff, 0x3333ff); $scatterLayerObj = $c->addScatterLayer($dataX1, $dataY1, "", SquareSymbol, 9, 0x803333ff, 0x803333ff); $scatterLayerObj->setSymbolScale($dataZX1, XAxisScale, $dataZY1, YAxisScale); #Add (dataX2, dataY2) as a standard scatter layer, and also as a "bubble" #scatter layer, using diamonds as symbols. The "bubble" scatter layer has symbol #size modulated by (dataZX2, dataZY2) using the scale on the x and y axes. $c->addScatterLayer($dataX2, $dataY2, "Vendor C", DiamondSymbol, 9, 0xff00, 0xff00); $scatterLayerObj = $c->addScatterLayer($dataX2, $dataY2, "", DiamondSymbol, 9, 0x8033ff33, 0x8033ff33); $scatterLayerObj->setSymbolScale($dataZX2, XAxisScale, $dataZY2, YAxisScale); #output the chart header("Content-type: image/png"); print($c->makeChart2(PNG)); ?>


he image map coordinates of a data point as represented in the layer as HTML image map attributes.getImageCoor2LayerGet the image map coordinates of a region containing all data points at the given x-position as HTML image map attributes.getHTMLImageMapLayerGenerate the HTML image map for all data points as represented on the layer.setHTMLImageMapLayerOverride the default arguments used when generating HTML image map for the layer.
td>Set the names to be used to denote morning and afternoon.layout(Self)Perform auto-scaling of the axis and compute the positions of the various objects in the chart.makeChart(Self)Generate the chart image and save it into a file.makeChart2(Self)Generate the chart as an image in memory.makeChart3(Self)Generate the chart in internal format and return a DrawArea object to allow adding custom drawings on top of the chart.makeSession(Self)Generate the chart as an image and save it to a session variable.getHTMLImageMap(Self)Generate an HTML image map for the chart.
">© 2004 Advanced Software Engineering Limited. All rights reserved. d>lowess(Self)Fit a curve through the data points in the ArrayMath object using the LOWESS algorithm.lowess2(Self)Fit a curve through the data points in the ArrayMath object using the LOWESS algorithm, where the spacing of the data points is supplied by the given array.result(Self)Get the content of the ArrayMath object as a normal array to be used in other ChartDirector API.max(Self)Get the maximum value of the elements of the ArrayMath object.min(Self)Get the minimum value of the elements of the ArrayMath object.avg(Self)Get the average value of the elements of the ArrayMath object.sum(Self)Get the total value of the elements of the ArrayMath object.med(Self)Get the median value of the elements of the ArrayMath object.percentile(Self)Get the required percentile value of the elements of the ArrayMath object.maxIndex(Self)Get the index of the maximum value element of the ArrayMath object.minIndex(Self)Get the index of the minimum value element of the ArrayMath object.
(1059, '1999-03-01', '371', '635', '722');