Mhairi McNeill questions

Mhairi McNeill answers

• How to add noise in R
• Does R have a way of preserving column format when exporting a data frame?
• Removing stopwords from a user-defined corpus in R
• Find the longest continuous chunk of TRUE in a boolean vector
• R: calculate the quotient of 2 columns by ID
• Hole in Bullseye in ggplot2
• Weighted Average in R using NA weights