Hi!
Try: myMatrix <- as.matrix(myDataFrame)
Looking at ?data.matrix: "Return the matrix obtained by converting all
the variables in a data frame to numeric mode".
You could also do directly: myMatrix <- as.matrix(myList)
Though you might need to transpose (see ?t)
HTH,
Ivan
Le 3/11/2010 17:03, anna a écrit :
Hi guys, here is a list of names that I have:
MyList:
myList<-list("A", "B","C","D")
myList
[[1]]
[1] "A"
[[2]]
[1] "B"
[[3]]
[1] "C"
[[4]]
[1] "D"
I want to turn this list into a matrix of 1 row and 4 columns with those
four components (A, B, C, D) so here is what I do:
myDataFrame<- data.frame(myList) and here is how myDataFrame looks like:
myDataFrame
X.A. X.B. X.C. X.D.
1 A B C D
Until that point everything is ok because if I want to retrieve one element
I make
myDataFrame[[1]]
[1] A
Levels: A
But when I try to convert into matrix by doing this:
myMatrix<- data.matrix(myDataFrame) I get this:
myMatrix
X.A. X.B. X.C. X.D.
[1,] 1 1 1 1
He just keeps the names and delete the components...What am I doing wrong?
Thanks in advance!
-----
Anna Lippel
--
Ivan CALANDRA
PhD Student
University of Hamburg
Biozentrum Grindel und Zoologisches Museum
Abt. Säugetiere
Martin-Luther-King-Platz 3
D-20146 Hamburg, GERMANY
+49(0)40 42838 6231
ivan.calan...@uni-hamburg.de
**********
http://www.for771.uni-bonn.de
http://webapp5.rrz.uni-hamburg.de/mammals/eng/mitarbeiter.php
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