ChartDirector Ver 3.0 (C++ Edition)

Simple Line Chart




This example demonstrates the following basic steps in creating line chart:

Source Code Listing

[The following project is available in "cppdemo/simpleline".]
#include "chartdir.h" int main(int argc, char *argv[]) { //The data for the line chart double data[] = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 91, 60, 55, 53, 35, 50, 66, 56, 48, 52, 65, 62}; //The labels for the line chart const char *labels[] = {"0", "", "", "3", "", "", "6", "", "", "9", "", "", "12", "", "", "15", "", "", "18", "", "", "21", "", "", "24"}; //Create a XYChart object of size 250 x 250 pixels XYChart *c = new XYChart(250, 250); //Set the plotarea at (30, 20) and of size 200 x 200 pixels c->setPlotArea(30, 20, 200, 200); //Add a line chart layer using the given data c->addLineLayer(DoubleArray(data, sizeof(data)/sizeof(*data))); //Set the x axis labels using the given labels c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(*labels))); //output the chart c->makeChart("simpleline.png"); //free up resources delete c; return 0; }