Hi R helpers, I'm trying to create a count in R , but as there is no retain function like in SAS I'm running into difficulties.
I have the following : Date_var and wish to obtain Date_var Count_var 01/01/2011 01/01/2011 1 01/01/2011 01/01/2011 2 02/01/2011 02/01/2011 1 02/01/2011 02/01/2011 2 02/01/2011 02/01/2011 3 02/01/2011 02/01/2011 4 03/01/2011 03/01/2011 1 03/01/2011 03/01/2011 2 03/01/2011 03/01/2011 3 03/01/2011 03/01/2011 4 03/01/2011 03/01/2011 5 03/01/2011 03/01/2011 6 03/01/2011 03/01/2011 7 As can be seen above the count var is re initialised every time a new date is found. I hope this is easy. Many thanks in advance for assistance. It is appreciated. Cheers Jon -- View this message in context: http://r.789695.n4.nabble.com/creating-a-count-variable-in-R-tp3334288p3334288.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org 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.
