Group data into date-oriented buckets, e.g. week or month in R

Group_by_Date.r

library(dplyr)
# Signup.Date is original date information in Date format
# Signup.Week is beginning date of week that contains Signup.Date
# cut function can take other parameters instead of "weeks": "day", "week", "month", "quarter" and "year"

# adds a column of dates to the dataframe that groups data into week-long buckets
clean_data <- clean_data %>% mutate(Signup.Week = cut(Signup.Date, "weeks"))