File indexing completed on 2024-05-05 03:46:04

 #include <QApplication>
 #include <QHBoxLayout>
 #include <QWidget>
 
 #include <labplot/labplot.h>
 
 int main(int argc, char **argv) {
     QApplication app (argc, argv);
 
     auto* mainWidget = new QWidget();
     auto*  layout = new QHBoxLayout;
     mainWidget->setLayout(layout);
 
     //create a worksheet and a plot
     auto* worksheet = new Worksheet("test");
 
     //create a plot
     auto* plot = new CartesianPlot("plot");
     plot->setType(CartesianPlot::Type::FourAxes);
     worksheet->addChild(plot);
 
     //Generate some data for f(x) = a*x^2 + b*x + c with additional noise
     int count = 10;
     double a = 1.27;
     double b = 4.375;
     double c = -6.692;
 
     auto* x = new Column("x");
     auto* y = new Column("y");
 
     for (int i = 0; i < count; ++i) {
         x->setValueAt(i, i);
         double rand_value = 10*double(qrand())/double(RAND_MAX);
         double value = a*pow(i, 2) + b*i + c + rand_value;
         y->setValueAt(i, value);
     }
 
     auto* curve = new XYCurve("raw data");
     curve->setXColumn(x);
     curve->setYColumn(y);
 //  curve->setLineStyle(XYCurve::LineStyle::NoLine);
 //  curve->symbol()->setStyle(Symbol::Circle);
     plot->addChild(curve);
     plot->autoScale();
 
     //perform a fit to the raw data and show it
     auto* fitCurve = new XYFitCurve("fit ");
     //TODO:
     fitCurve->recalculate();
     plot->addChild(fitCurve);
 
     //add a curve defined via a mathematical equation
     auto* eqCurve = new XYEquationCurve("eq");
     plot->addChild(eqCurve);
     auto data = XYEquationCurve::EquationData();
     data.expression1 = "50*sin(x)";
     data.min = "0.0";
     data.max = "10.0";
     eqCurve->setEquationData(data);
     eqCurve->recalculate();
 
     //add legend
     plot->addLegend();
 
     //create another plot
     auto* plot2 = new CartesianPlot("plot 2");
     plot2->setType(CartesianPlot::Type::FourAxes);
     worksheet->addChild(plot2);
 
     //create some random data and plot a histogram for them
     auto* hist = new Histogram("histogram");
     auto* random_data = new Column("x");
 
     for (int i = 0; i < 1000; ++i)
         random_data->setValueAt(i, double(100*qrand())/double(RAND_MAX));
 
     hist->setDataColumn(random_data);
     plot2->addChild(hist);
 
     //create one more plot
     auto* plot3 = new CartesianPlot("plot 3");
     plot3->setType(CartesianPlot::Type::FourAxes);
     worksheet->addChild(plot3);
 
     //add box plot
     auto* boxPlot = new BoxPlot("boxplot");
     QVector<const AbstractColumn*> columns{random_data};
     boxPlot->setDataColumns(columns);
     plot3->addChild(boxPlot);
 
     layout->addWidget(worksheet->view());
     mainWidget->show();
 
     return app.exec();
 }