#Hi R-users,
#I have an example DF like this:

y1 <- rnorm(10) + 6.8
y2 <- rnorm(10) + (1:10*1.7 + 1)
y3 <- rnorm(10) + (1:10*6.7 + 3.7)
y <- c(y1,y2,y3)
x <- rep(1:3,10)
f <- gl(2,15, labels=paste("lev", 1:2, sep=""))
g <- seq(as.Date("2000/1/1"), by="day", length=30)
DF <- data.frame(x=x,y=y, f=f, g=g)
DF$wdays <- weekdays(DF$g)
DF$conc <- paste(DF$g, DF$wdays)
DF

#Now I calculate group means

tmp <- aggregate(DF$y, list(DF$x, DF$f), mean)
tmp

#After doing this, I want to merge string from DF$conc to tmp using DF$x and
DF$y as an identifier
#The following DF should look like this:

  Group.1 Group.2         x var1
1       1    lev1  6.607869 2000-01-01 Saturday, 2000-01-04 Tuesday,
2000-01-07 Friday, 2000-01-10 Monday etc.
2       2    lev1  6.598861 etc.
3       3    lev1  7.469262
4       1    lev2 27.488734
5       2    lev2 33.164037
6       3    lev2 34.466359

#How do I do this?

#Cheers,
#Lauri

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