one way is the following:
mylist <- list(x1 = c("A","A","A","B","C","Z","Y"),
x2 = c("D","D","E","E","F","Z","X"),
x3 = c("A","A","A","B","Y","Z"))
newlist <- c("A","B","C","D","E","F")
tab <- t(sapply(mylist, function (x)
table(factor(x, levels = newlist))))
tab[tab == 0] <- NA
tab
I hope it helps.
Best,
Dimitris
On 8/26/2010 11:47 AM, Olga Lyashevska wrote:
Dear all,
I have a list that contains 3 sublists( x1, x2, x3)
mylist<-list(x1=c("A","A","A","B","C","Z","Y"),x2=c("D","D","E","E","F","Z","X"),x3=c("A","A","A","B","Y","Z"))
mylist
$x1
[1] "A" "A" "A" "B" "C" "Z" "Y"
$x2
[1] "D" "D" "E" "E" "F" "Z" "X"
$x3
[1] "A" "A" "A" "B" "Y" "Z"
I also have another list, that contains some specific elements.
newlist<-c("A","B","C","D","E","F")
newlist
[1] "A" "B" "C" "D" "E" "F"
I want to match mylist[1], mylist[2], etc with newlist and I am looking for the
following output:
A B C D E F
x1 3 1 1 NA NA NA
x2 NA NA NA 2 2 1
x3 3 1 NA NA NA NA
Any thoughts?
Many thanks
Olga
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--
Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus University Medical Center
Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014
______________________________________________
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
