ChartDirector 7.1 (C++ Edition)

Scatter Chart




This example demonstrates a scatter chart created using XYChart.addScatterLayer.

Source Code Listing

The following is the command line version of the code in "cppdemo/scatter". The MFC version of the code is in "mfcdemo/mfcdemo". The Qt Widgets version of the code is in "qtdemo/qtdemo". The QML/Qt Quick version of the code is in "qmldemo/qmldemo".
#include "chartdir.h" int main(int argc, char *argv[]) { // The XY points for the scatter chart double dataX0[] = {10, 15, 6, 12, 14, 8, 13, 13, 16, 12, 10.5}; const int dataX0_size = (int)(sizeof(dataX0)/sizeof(*dataX0)); double dataY0[] = {130, 150, 80, 110, 110, 105, 130, 115, 170, 125, 125}; const int dataY0_size = (int)(sizeof(dataY0)/sizeof(*dataY0)); double dataX1[] = {6, 12, 4, 3.5, 7, 8, 9, 10, 12, 11, 8}; const int dataX1_size = (int)(sizeof(dataX1)/sizeof(*dataX1)); double dataY1[] = {65, 80, 40, 45, 70, 80, 80, 90, 100, 105, 60}; const int dataY1_size = (int)(sizeof(dataY1)/sizeof(*dataY1)); // Create a XYChart object of size 450 x 420 pixels XYChart* 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 12pt Times Bold // Italic font. Set the background and border color to Transparent. c->addLegend(50, 30, false, "Times New Roman Bold Italic", 12)->setBackground(Chart::Transparent ); // Add a title to the chart using 18pt Times Bold Itatic font. c->addTitle("Genetically Modified Predator", "Times New Roman Bold Italic", 18); // Add a title to the y axis using 12pt Arial Bold Italic font c->yAxis()->setTitle("Length (cm)", "Arial Bold Italic", 12); // Add a title to the x axis using 12pt Arial Bold Italic font c->xAxis()->setTitle("Weight (kg)", "Arial Bold Italic", 12); // Set the axes line width to 3 pixels c->xAxis()->setWidth(3); c->yAxis()->setWidth(3); // Add an orange (0xff9933) scatter chart layer, using 13 pixel diamonds as symbols c->addScatterLayer(DoubleArray(dataX0, dataX0_size), DoubleArray(dataY0, dataY0_size), "Genetically Engineered", Chart::DiamondSymbol, 13, 0xff9933); // Add a green (0x33ff33) scatter chart layer, using 11 pixel triangles as symbols c->addScatterLayer(DoubleArray(dataX1, dataX1_size), DoubleArray(dataY1, dataY1_size), "Natural", Chart::TriangleSymbol, 11, 0x33ff33); // Output the chart c->makeChart("scatter.png"); //free up resources delete c; return 0; }