Chuck P questions

Chuck P answers

• How to count and add total number of observations (n) to ggplot (geom_point)
• R/dplyr: How to only keep integers in a data frame?
• The difference between Map() and map () from Purrr package in R
• Use both empty and string filters in dplyr's filter
• How can I distribute a vector of numbers by a vector of percentages, round the result, and always get the same total that I started with in R?