Convert date field to Quarter in R

Question

I have data frame which has the date column in format 08/21/2000(m/d/Y).

Now I want to add new column which display the date in Quarter

Answer 1

The zoo library has created a set of functions to handle year-quarter vectors:

library(zoo)
mydf$var9=as.yearqtr(as.Date( mydf$Order.Date, "%m/%d/%Y" ).