Function main

lib/examples/example1/main.cpp:7–94

#include <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(QStringLiteral("test"));

	// create a plot
	auto* plot = new CartesianPlot(QStringLiteral("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(QStringLiteral("x"));
	auto* y = new Column(QStringLiteral("y"));

	for (int i = 0; i < count; ++i) {
		x->setValueAt(i, i);
		double rand_value = 10 * double(rand()) / double(RAND_MAX);
		double value = a * pow(i, 2) + b * i + c + rand_value;
		y->setValueAt(i, value);
	}

	auto* curve = new XYCurve(QStringLiteral("raw data"));
	curve->setXColumn(x);
	curve->setYColumn(y);
	// 	curve->setLineStyle(XYCurve::LineStyle::NoLine);
	// 	curve->symbol()->setStyle(Symbol::Circle);
	plot->addChild(curve);

	// perform a fit to the raw data and show it
	auto* fitCurve = new XYFitCurve(QStringLiteral("fit"));
	// TODO:
	fitCurve->recalculate();
	plot->addChild(fitCurve);

	// add a curve defined via a mathematical equation
	auto* eqCurve = new XYEquationCurve(QStringLiteral("eq"));
	plot->addChild(eqCurve);
	auto data = XYEquationCurve::EquationData();
	data.expression1 = QStringLiteral("50*sin(x)");
	data.min = QStringLiteral("0.0");
	data.max = QStringLiteral("10.0");
	eqCurve->setEquationData(data);
	eqCurve->recalculate();

	// add legend
	plot->addLegend();

	// create another plot