format a Date column in a Data Frame

Question

I\'ve the following data from a data frame

Name,JoiningDate,AmtPaid
Joe,12/31/09,1000
Amy,10/28/09,100
John,05/06/10,200

The Joining Date i

Answer 1

The data.table package has its IDate class and functionalities similar to lubridate or the zoo package. You could do:

dt = data.table(
  Name = c('Joe', 'Amy', 'John'),
  JoiningDate = c('12/31/09', '10/28/09', '05/06/10'),
  AmtPaid = c(1000, 100, 200)
)

require(data.table)
dt[ , JoiningDate := as.IDate(JoiningDate, '%m/%d/%y') ]