Hello, This is likely fairly silly question, and I apologize to whomever takes the time to respond.
I am a relatively new user of R, on Windows XP, version 2.3.1. Say I have a data table that looks like the following: x Date Location Amount Blue Green 1 01/01/2001 Central 1817 TRUE FALSE 2 01/02/2001 Central 20358 FALSE TRUE 3 05/08/2001 Central 16245 FALSE TRUE 4 02/02/2002 Western 112 TRUE FALSE 5 21/03/2002 Western 98756 TRUE FALSE 6 01/04/2002 Western 1598414 FALSE TRUE 7 07/01/2001 Western 1255 FALSE TRUE 8 20/10/2003 Central 16289 TRUE FALSE 9 21/10/2003 Eastern 10000 FALSE TRUE 10 22/10/2003 Eastern 98737 FALSE TRUE 11 23/10/2003 Eastern 198756 TRUE FALSE 12 24/10/2003 Eastern 98756 FALSE TRUE 13 25/10/2003 Eastern 65895 TRUE FALSE 14 26/10/2003 Eastern 2142266 FALSE TRUE 15 27/10/2003 North 98756 TRUE FALSE 16 28/10/2003 North 548236 FALSE TRUE and I want to do some summaries by Fiscal year (or FY quarter). Reading manuals and such, I cobbled this less than satisfactory bit together to start to build a factor representing a fiscal year split: y<-as.Date(x$Date,"%d/%m/%Y") y<-as.matrix(y) y$FY0203<-ifelse((y>=(as.Date("2002-03-21")))&(y<=(as.Date ("2003-04-01"))),"TRUE","FALSE") the values seem correct, but aside from ugly, the data is not in the proper format - with some more effort I might fix that... But my question is: is there a more simple function available to select a range of dates? Or, at least, a more elegant approach? [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.