Points Geometry

This is an example for the points geometry which uses the classic Iris data set

Output

#include "trase.hpp"
#include <fstream>
#include <random>

using namespace trase;

int main() {
  CSVDownloader dl;
  auto csv = dl.download(
      "http://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data",
      {"sepal_length", "sepal_width", "petal_length", "petal_width", "class"});
  auto fig = figure();
  auto ax = fig->axis();
  auto data = create_data()
                  .x(csv["sepal_length"])
                  .y(csv["sepal_width"])
                  .color(csv["petal_width"]);

  auto points = ax->points(data);

  ax->xlabel("sepal length");
  ax->ylabel("sepal width");

// output to chosen backend
#ifdef TRASE_EXAMPLES_SVG_BACKEND
  std::ofstream out;
  out.open("example_points.svg");
  BackendSVG backend(out);
  fig->draw(backend);
  out.close();
#endif
#ifdef TRASE_EXAMPLES_GL_BACKEND
  BackendGL backend;
  fig->show(backend);
#endif
}