• re-define data “wrangling” in R
• simpler, more intuitive syntax
• faster, better performance for large data tables

Open BADAS3_practical.html and complete exercises 1 to 3

dat <- group_by(mydata, group)
dat2 <- summarise(dat,
  mean_var = mean(var, na.rm = TRUE))

magrittr from Stefan Milton Bache

data_summarized <- mydata %>% 
  group_by(group) %>% 
  summarise(mean_var = mean(var, na.rm = TRUE))

Piping adequat for short sequence functions calls

• avoid pipes that are too long => create intermediate results (with good bnames !)
• the pipe does not deal well with multiple inputs or multiple outputs

• Rstudio cheatsheet

• dplyr website

Open BADAS3_practical.html and complete exercises 4 to 10