Generally, we follow Hadley Wickham’s R style guide.
Most importantly: * Use <- for assignment, not =. * Operators do get spacing, parentheses do not: if (x + 1) print("yes") * Use short, clear, and consistent variable names. * [[Clearly comment your code and data|Documentation]].
We’re using a standard set of R packages to handle many tasks–mostly from what is known as the tidyverse. These include: * dplyr for data manipulation and processing; * tidyr for data reshaping; * assertthat for assertions; * tibble for better data frames; * magrittr for building pipelines.
A word about pipelines: we aim to use these consistently and when it makes sense…but don’t take things to extremes. Sometimes y <- f(g(x)) really is the clearest notation.
The package tests will raise an error for all of these: * R’s match() function * The reshape or reshape2 packages (i.e. melt or cast) * Loops (this is not an ironclad prohibition, but should be very rare) * R’s ifelse function - if necessary use dplyr::if_else instead * Any of R’s apply family of functions, rowMeans, etc. (again, with rare exceptions) * Successive mutate() calls. See Hints for speed