What are some examples of data visualization using C++ and Qt?

What are some examples of data visualization using C++ and Qt?

C++ with Qt offers various visualization options like QCustomPlot for plotting data, and Qt Charts for creating interactive charts.

Can you show me a simple code example using QCustomPlot?

Sure! Here's a basic example:

#include <QApplication>
#include <QMainWindow>
#include "qcustomplot.h"

int main(int argc, char *argv[]) {
    QApplication a(argc, argv);
    QMainWindow w;
    QCustomPlot *customPlot = new QCustomPlot;
    w.setCentralWidget(customPlot);

    QVector<double> x(101), y(101); // initialize with entries 0..100
    for (int i=0; i<101; ++i) {
        x[i] = i/50.0 - 1; // x goes from -1 to 1
        y[i] = x[i]*x[i]; // let's plot a quadratic function
    }
    customPlot->addGraph(); // create graph
    customPlot->graph(0)->setData(x, y); // set data
    customPlot->xAxis->setLabel("x");
    customPlot->yAxis->setLabel("y");
    customPlot->replot();

    w.resize(800, 600);
    w.show();
    return a.exec();
}

What libraries do I need to include for this example?

You'll need to include the QCustomPlot library in your project. Make sure to link against the QtWidgets and QtGui modules as well.

Are there any other visualization libraries in Qt I should consider?

Yes, you might also want to explore Qt Charts for more advanced charting capabilities, and Qwt for scientific plotting.