来自变量的C++图表系列名称

#include <matplotlibcpp.h>
namespace plt = matplotlibcpp;

int main() {
    std::vector<double> x = {1, 2, 3, 4, 5};
    std::vector<double> y1 = {1, 4, 9, 16, 25};
    std::vector<double> y2 = {1, 2, 3, 4, 5};

    plt::plot(x, y1, "r-", {{"label", "Series 1"}});
    plt::plot(x, y2, "b-", {{"label", "Series 2"}});

    plt::legend();
    plt::show();

    return 0;
}

#include <QApplication>
#include <QtCharts/QChartView>
#include <QtCharts/QLineSeries>
#include <QtCharts/QChart>

QT_CHARTS_USE_NAMESPACE

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

    QLineSeries *series1 = new QLineSeries();
    series1->append(0, 6);
    series1->append(2, 4);
    series1->append(3, 8);
    series1->append(7, 4);
    series1->append(10, 5);
    series1->setName("Series 1");

    QLineSeries *series2 = new QLineSeries();
    series2->append(0, 1);
    series2->append(2, 3);
    series2->append(3, 5);
    series2->append(7, 2);
    series2->append(10, 3);
    series2->setName("Series 2");

    QChart *chart = new QChart();
    chart->addSeries(series1);
    chart->addSeries(series2);
    chart->createDefaultAxes();
    chart->setTitle("Sample Chart");

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

    chartView->show();

    return a.exec();
}