Training materials
Authors: Hadley Wickham
and Contributors: Anatole Chessel or Emma Leith or Hadley Wickham or Jean-François Dufayard or Martin Krzywinski or Nicola Soranzo
Authors: Hadley Wickham
and Contributors: Anatole Chessel or Emma Leith or Hadley Wickham or Jean-François Dufayard or Martin Krzywinski or Nicola Soranzo