date objects
Hi Erin,
"Best" is subjective, but I like
library(lubridate)
library(plyr)
xb.df <- mutate(xb.df,
time = ymd(time, truncated = 1),
year = year(time),
quarter = quarter(time))
Best,
Ista
On Mon, Feb 17, 2014 at 7:35 PM, Erin Hodgess <erinm.hodgess at gmail.com> wrote:
Hello! I generate the following two data frames:
xa.df <- data.frame(x=rnorm(10),time=2001:2010) xa.df
x time 1 -1.73207086 2001 2 -0.84014049 2002 3 -0.02332163 2003 4 -1.47236670 2004 5 -0.17736265 2005 6 -1.27134314 2006 7 -2.53425374 2007 8 0.79132952 2008 9 1.16574188 2009 10 1.99660600 2010
tim1 <- c("2010-01","2010-02","2010-03","2010-04","2011-01","2011-02",
+ "2011-03","2011-04")
xb.df <- data.frame(y=rnorm(8),time=tim1) xb.df
y time 1 -1.5175587 2010-01 2 1.2035292 2010-02 3 -0.7313063 2010-03 4 -1.5544370 2010-04 5 -0.5907269 2011-01 6 1.0634754 2011-02 7 0.9029293 2011-03 8 0.5996780 2011-04
What is the best way to turn the time columns into date objects (annual and
quarterly)?
Thanks,
Erin
--
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: erinm.hodgess at gmail.com
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