写一段用QT实现实时绘制折线图的代码

好的，我会为您提供一段用QT实现实时绘制折线图的代码：

#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCore/QTime>
#include <QtCore/QTimer>
#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>


QT_CHARTS_USE_NAMESPACE

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QLineSeries *series = new QLineSeries();

    QChart *chart = new QChart();
    chart->legend()->hide();
    chart->addSeries(series);
    chart->createDefaultAxes();
    chart->setTitle("Real-time Line Chart");

    QChartView *chartView = new QChartView(chart);
    chartView->setRenderHint(QPainter::Antialiasing);

    QMainWindow window;
    window.setCentralWidget(chartView);

    QTimer timer;
    QObject::connect(&timer, &QTimer::timeout, [=]() {
        static QTime time(QTime::currentTime());
        series->append(time.elapsed()/1000.0, qSin(time.elapsed()/1000.0));
        chart->axisX()->setMax(time.elapsed()/1000.0);
    });
    timer.start(50);

    window.resize(800, 600);
    window.show();

    return a.exec();
}

这段代码可以实现用QT绘制实时折线图，并且自动更新数据。但请注意，此代码仅供参考，具体实现要根据您自己的需求进行调整。