It's going to work better if you offer a non-ambiguous version of your data. Use dump or dput. If you use the dump route, then see the Posting Guide example. If you use dput, then it is as simple as dput(object).

Perhaps (if dfrm is the name of a dataframe):

dput(head(dfrm))


On Apr 15, 2010, at 5:27 PM, prem_R wrote:


This is my sample data

2000/01/01

We cannot tell from the output whether that is a factor or a character vector.

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.


--


David Winsemius, MD
West Hartford, CT

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