SetSamples Function

[CodeFreak]

Hi everyone,
I'm beginner in coding.
May anyone help me how should I use SetSamples() Function?
:

{
    ui->setupUi(this);
 
    QwtPlot *BPlot = new QwtPlot(this);
    setCentralWidget(BPlot);
 
    QwtPlotCurve *curve1 = new QwtPlotCurve("Curve 1");
    double frequency=10.288;
    double amp=10.288;
    int count=10;
 
    curve1->setSamples(frequency,amp,count); 
    curve1->attach(BPlot);
    BPlot->replot();
}
MainWindow::~MainWindow()
{
    delete ui;
}

{
    ui->setupUi(this);

    QwtPlot *BPlot = new QwtPlot(this);
    setCentralWidget(BPlot);

    QwtPlotCurve *curve1 = new QwtPlotCurve("Curve 1");
    double frequency=10.288;
    double amp=10.288;
    int count=10;

    curve1->setSamples(frequency,amp,count); 
    curve1->attach(BPlot);
    BPlot->replot();
}
MainWindow::~MainWindow()
{
    delete ui;
}

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no matching function for call to 'QwtPlotCurve::setSamples(double&, double&, int&)'
curve1->setSamples(frequency,amp,count);