library(xts)
data <- data.frame(year_week = c(\"2016-46\", \"2016-47\", \"2016-48\"),
satisfaction = c(0.25, 0.45, 0.58))
data = xts(data[-1], or
This is a variant on a quasi-FAQ on 'by can one not parse year and month as a date': because a date is day and month and year.
Or year, a year and week and day. Otherwise you are indeterminate:
> as.Date(format(Sys.Date(), "%Y-%W-%d"), "%Y-%W-%d")
[1] "2017-12-04"
>
using
> Sys.Date()
[1] "2017-12-04"
> format(Sys.Date(), "%Y-%W-%d")
[1] "2017-49-04"
>
so %W
works on input and output provided you also supply a day.
For input data that does not have a day, you could just add a given weekday, say 1:
> as.Date(paste0(c("2016-46", "2016-47", "2016-48"), "-1"), "%Y-%W-%w")
[1] "2016-11-14" "2016-11-21" "2016-11-28"
>