try this:
x1 <- matrix(NA, 6, 6,
dimnames = list(letters[1:6], LETTERS[1:6]))
x2 <- matrix(rpois(9, 1), 3, 3,
dimnames = list(c("b","a","f"), c("D","E","F")))
x1[rownames(x2), colnames(x2)] <- x2
x1
I hope it helps.
Best,
Dimitris
----
Dimitris Rizopoulos
Biostatistical Centre
School of Public Health
Catholic University of Leuven
Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
http://www.student.kuleuven.be/~m0390867/dimitris.htm
----- Original Message -----
From: "Shubha Vishwanath Karanth" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, June 09, 2008 1:26 PM
Subject: [R] Overlaying the matrices
Hi R,
I have a matrix,
x1=matrix(NA,6,6,dimnames=list(letters[1:6],LETTERS[1:6]))
x1
A B C D E F
a NA NA NA NA NA NA
b NA NA NA NA NA NA
c NA NA NA NA NA NA
d NA NA NA NA NA NA
e NA NA NA NA NA NA
f NA NA NA NA NA NA
x2=matrix(rpois(9,1),3,3,dimnames=list(c("b","a","f"),c("D","E","F")))
x2
D E F
b 0 3 0
a 2 2 1
f 1 0 0
I need to put the values of x2 in the corresponding elements of x1.
So
then, x1 would look like:
A B C D E F
a NA NA NA 2 2 1
b NA NA NA 0 3 0
c NA NA NA NA NA NA
d NA NA NA NA NA NA
e NA NA NA NA NA NA
f NA NA NA 1 0 0
What would be the best way to do this?
Many Thanks,
Shubha
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