Question

I have a file with dates in the format YYYY-mm. I am trying to prepare my data for a time series analysis and therefore need to convert the formats from factor to a Date format.

What I’ve tried:

x <- '2011-11'
as.Date(as.character(a), "%Y-%m")

the last line gives me an output NA.

Thank you!

Answer 1

“2011-11” is not a date (where’s the day)? Either add a day:

a <- '2011-11'
as.Date(paste0(a,'-01'))

or use zoo’s yearmon class:

library(zoo)
as.yearmon(a)