Find the day of a week

Question

Let\'s say that I have a date in R and it\'s formatted as follows.

   date      
2012-02-01 
2012-02-01
2012-02-02

Is there any way in R to

Answer 1

Look up ?strftime:

%A Full weekday name in the current locale

df$day = strftime(df$date,'%A')