Richie Cotton is a course creator for DataCamp . He has been using R since 2004, for analysing data in the chemcial health and safety, debt collection, and proteomics fields. He has written two books on R, Learning R, and Testing R Code. 4D Pie Charts is a collection of thoughts on scientific programming generated by spending too much time playing with R. Earlier posts include some MATLAB too. Follow him on twitter @richierocks.