Re: [R] Removing rows with earlier dates

0 at 3:24 PM, David Winsemius wrote: > > On Dec 29, 2010, at 9:24 AM, Ali Salekfard wrote: > > Thanks to everyone. Joshua's response seemed the most concise one, but it >> used up so much memory that my R just gave error. I checked the other >> replies and all in all

Re: [R] Removing rows with earlier dates

Thanks to everyone. Joshua's response seemed the most concise one, but it used up so much memory that my R just gave error. I checked the other replies and all in all I came up with this, and thought to share it with others and get comments. My structure was as follows: ACCOUNT RULE DATE A1

[R] Removing rows with earlier dates

Hi all, I'm new to the list but have benfited from it quite extensively. Straight to my rather strange question: I have a data frame that contains mapping rules in this way: ACCOUNT, RULE COLUMNS, Effective Date The dataframe comes from a database that stores all dates. What I would like to do