如何使用C++進行高效率的資料視覺化？

#include <iostream>
#include <fstream>
#include <vector>

int main() {
    std::ifstream file("data.txt"); // 打开文件
    std::vector<double> data; // 存储数据的容器

    if (file.is_open()) {
        double value;
        while (file >> value) {
            data.push_back(value);
        }
        file.close();
    } else {
        std::cout << "无法打开文件" << std::endl;
        return 1;
    }

    // 对数据进行处理和分析
    // ...

    return 0;
}

#include <QtWidgets/QApplication>
#include <QtWidgets/QMainWindow>
#include <QtCharts/QChartView>
#include <QtCharts/QBarSet>
#include <QtCharts/QBarSeries>
#include <QtCharts/QBarCategoryAxis>

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

    // 创建柱状图数据系列
    QtCharts::QBarSeries *series = new QtCharts::QBarSeries();
    QtCharts::QBarSet *set = new QtCharts::QBarSet("数据");
    for (double value : data) {
        *set << value;
    }
    series->append(set);

    // 创建柱状图的横坐标
    QtCharts::QBarCategoryAxis *axisX = new QtCharts::QBarCategoryAxis();
    for (int i = 0; i < data.size(); ++i) {
        axisX->append(QString::number(i + 1));
    }

    // 创建图表视图
    QtCharts::QChartView *chartView = new QtCharts::QChartView();
    QMainWindow mainWindow;
    mainWindow.setCentralWidget(chartView);

    // 设置图表
    QtCharts::QChart *chart = new QtCharts::QChart();
    chart->addSeries(series);
    chart->setAxisX(axisX, series);
    chart->setTitle("数据可视化");
    chartView->setChart(chart);

    // 显示图表窗口
    mainWindow.show();

    return a.exec();
}