簡単なサインカーブ[0-360]:Qwt

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <qwt_plot_curve.h>

MainWindow::MainWindow(QWidget *parent) :
    QwtPlot(parent)
{
    setTitle( "Sin Curve" );//グラフのタイトル

    QwtPlotCurve *curve = new QwtPlotCurve();
    curve->attach(this);

    const int kArraySize = 37;

    double plotX[kArraySize] = {}; // x
    double plotY[kArraySize] = {}; // y

    int i= 0;
    for(int k = 0; k <= 360; k+=10 ){
        double x = k;
        double y = sin(k*M_PI/180);

        qDebug() << i << "::" << k << "::" << x <<"::"<<y;

        plotX[i] = x;
        plotY[i] = y;
        ++i;
    }

    curve->setSamples(plotX, plotY, kArraySize);

    resize( 600, 400 );
}

MainWindow::~MainWindow()
{
    delete ui;
}