matplotlib-cpp/examples/modern.cpp

#define _USE_MATH_DEFINES
#include <cmath>
#include "../matplotlibcpp.h"

using namespace std;
namespace plt = matplotlibcpp;

int main() 
{
	// plot(y) - the x-coordinates are implicitly set to [0,1,...,n)
	//plt::plot({1,2,3,4}); 
	
	// Prepare data for parametric plot.
	int n = 5000; // number of data points
	vector<double> x(n),y(n); 
	for(int i=0; i<n; ++i) {
		double t = 2*M_PI*i/n;
		x.at(i) = 16*sin(t)*sin(t)*sin(t);
		y.at(i) = 13*cos(t) - 5*cos(2*t) - 2*cos(3*t) - cos(4*t);
	}

	// plot() takes an arbitrary number of (x,y,format)-triples. 
	// x must be iterable (that is, anything providing begin(x) and end(x)),
	// y must either be callable (providing operator() const) or iterable. 
	plt::plot(x, y, "r-", x, [](double d) { return 12.5+abs(sin(d)); }, "k-");

	//plt::set_aspect(0.5);
	plt::set_aspect_equal();


	// show plots
	plt::show();
}