Note to self: Basic R operations #

After searching for that all too often and for too long (in particular the “add a column as index” bit):

• To read a file: d <- read.table(’/home/isabel/input’, sep=’,’, header=T, quote=’’)
  
• Useful for getting an overview of the data:summary(d); head(d); tail(d)
  
• For sorting some data frame: s <- d[order(d[,2]),];
  
• For adding a column to a data frame: s$idx <- seq(0, nrow(s) - 1, 1)
  
• For plotting a column: ggplot(s, aes(idx, engagement)) + geom_point() +scale_x_log10()