ChartDirector 6.0 (C++ Edition)

Scatter Chart




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

Source Code Listing

[The following code is available in "cppdemo/scatter". A MFC version of the code is available in "mfcdemo/mfcdemo" (Windows edition only). A QT version of the code is available in "qtdemo/qtdemo".]
#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};
    double dataY0[] = {130, 150, 80, 110, 110, 105, 130, 115, 170, 125, 125};

    double dataX1[] = {6, 12, 4, 3.5, 7, 8, 9, 10, 12, 11, 8};
    double dataY1[] = {65, 80, 40, 45, 70, 80, 80, 90, 100, 105, 60};

    // 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, "timesbi.ttf", 12)->setBackground(Chart::Transparent);

    // Add a title to the chart using 18pt Times Bold Itatic font.
    c->addTitle("Genetically Modified Predator", "timesbi.ttf", 18);

    // Add a title to the y axis using 12pt Arial Bold Italic font
    c->yAxis()->setTitle("Length (cm)", "arialbi.ttf", 12);

    // Add a title to the x axis using 12pt Arial Bold Italic font
    c->xAxis()->setTitle("Weight (kg)", "arialbi.ttf", 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, (int)(sizeof(dataX0) / sizeof(dataX0[0]))), DoubleArray(
        dataY0, (int)(sizeof(dataY0) / sizeof(dataY0[0]))), "Genetically Engineered",
        Chart::DiamondSymbol, 13, 0xff9933);

    // Add a green (0x33ff33) scatter chart layer, using 11 pixel triangles as symbols
    c->addScatterLayer(DoubleArray(dataX1, (int)(sizeof(dataX1) / sizeof(dataX1[0]))), DoubleArray(
        dataY1, (int)(sizeof(dataY1) / sizeof(dataY1[0]))), "Natural", Chart::TriangleSymbol, 11,
        0x33ff33);

    // Output the chart
    c->makeChart("scatter.png");

    //free up resources
    delete c;
    return 0;
}