Aggregate ISO weeks into months with a dataset containing just ISO weeks

Question

My data is in a dataframe which has a structure like this:

df2 <- data.frame(Year = c(\"2007\"), Week = c(1:12), Measurement = c(rnorm(12, mean = 4, sd =          


        

Answer 1

This can be done relatively simply in dplyr.

library(dplyr)

df2 %>% 
  mutate(Month = rep(1:3, each = 4)) %>% 
  group_by(Month) %>% 
  summarise(MonthlyMedian = stats::median(Measurement))

Basically, add a new column to define your months. I'm presuming since you don't have days, you are going to allocate 4 weeks per month? Then you just group by your Month variable and calculate the median. Very simple

Hope this helps