text: #include <random>
  #include <matplot/matplot.h>
  
  int main() {
      using namespace matplot;
  
      auto x = linspace(0,3*pi,200);
      auto y = transform(x, [&](double x) { return cos(x) + rand(0,1); });
      auto c = linspace(1, 10, x.size());
  
      scatter(x,y,c);
  
      wait();
      return 0;
  }