Compares the use of population and sample variance estimates by resampling a known distribution at different sample sizes. An implementation of the “Simulating Variance Estimates” by ProfessorParris on youTube

Hadley uses the gapminder dataset to demonstrate the value of dataframes of nested dataframes/lists for comparing models. Each functions can be run on each dataframe using the map() function from the purrr package (basically Hadley’s implementation of lapply()).

My personal Reshape cheat sheet/ intro. I have taken some examples from the [reshape2 paper](http://www.jstatsoft.org/v21/i12) and great explaination by [Sean Andersen](http://www.seananderson.ca/2013/10/19/reshape.html).