Jonathan Carroll questions

Jonathan Carroll answers

• R data frame columns to a vector that is like a dictionary
• R data.table: update with shift() does not work as expected
• Colour coding comments in RStudio
• Group dates by week in R
• Using gg_animate to create a gif
• R: any function for Cartesian Product of two data frames? [duplicate]
• Why does as.factor() on unicode strings return different results for every operating system?
• How do you create a 50 state map (instead of just lower-48)
• Plus sign between ggplot2 and other function (R) [duplicate]
• ggplot2: fill color behaviour of geom_ribbon