Re: [R] Calculating rolling mean by group

2012-01-10 Thread Sam Albers
Thanks for getting me on the right path Gabor! I have one outstanding issue though. On Mon, Jan 9, 2012 at 4:21 PM, Gabor Grothendieck wrote: > On Mon, Jan 9, 2012 at 6:39 PM, Sam Albers wrote: >> Hello all, >> >> I am trying to determine how to calculate rolling means in R using a >> grouping v

Re: [R] Calculating rolling mean by group

2012-01-09 Thread Gabor Grothendieck
On Mon, Jan 9, 2012 at 6:39 PM, Sam Albers wrote: > Hello all, > > I am trying to determine how to calculate rolling means in R using a > grouping variable. Say I have a dataframe like so: > > dat1 <- data.frame(x = runif(2190, 0, 125), year=rep(1995:2000, > each=365), jday=1:365, site="here") > d

[R] Calculating rolling mean by group

2012-01-09 Thread Sam Albers
Hello all, I am trying to determine how to calculate rolling means in R using a grouping variable. Say I have a dataframe like so: dat1 <- data.frame(x = runif(2190, 0, 125), year=rep(1995:2000, each=365), jday=1:365, site="here") dat2 <- data.frame(x = runif(2190, 0, 200), year=rep(1995:2000, ea