[R] Replace / with - in date

[prem_R]

This is my sample data

2000/01/01
2000/01/01
2000/02/01
2000/10/01
2000/19/01
2000/20/01
2000/21/01
2000/22/01
2000/23/01
2000/25/01
2000/26/01
2000/27/01
2000/28/01
2000/29/01

Tried using levels function but got the following error .
Error in levels(a$date) <- gsub("/", "-", levels(a$date)) : 
  attempt to set an attribute on NULL

Thanks.


-- 
View this message in context: http://n4.nabble.com/Replace-with-in-date-tp1911391p1934333.html
Sent from the R help mailing list archive at Nabble.com.