Adding List Elements To A Data Frame

On 7/19/2013 12:54 PM, Pete Brecknock wrote:

Hi

I am trying to add the contents of the list "myList" to a new column "z"
in
the data frame "myDataframe"

myList <- list(c("A1","B1"), c("A2","B2","C2"), c("A3","B3"))

myDataframe <- data.frame(x=c(1,2,3), y=c("R","S","T"))

Would like to produce

x  y  z
1  R  A1,B1
2  S  A2,B2,C2
3  T  A3,B3

myDataframe$z <- sapply(myList, paste0, collapse=",")

where z is a character string holding the contents of the different
elements
of the list.

Any thoughts greatly appreciated.

Pete

-- 
Brian S. Diggs, PhD
Senior Research Associate, Department of Surgery
Oregon Health & Science University

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