Hi,
First, create a MATRIX of the correct size:
xy <- matrix(nrow=3, ncol=3)
Then, in your for loop, you need to index each cell correctly, like this:
xy[i,j]
Finally, if you want to assign "1,4" to each cell, you need to paste
x[i] and y[j] together, like this:
xy[i,j]<-paste(x[i],y[j], sep=",")
With the brackets if you want:
xy[i,j]<-paste("(", x[i], ",", y[j], ")", sep="")
Or easier like this:
xy <- matrix(rep(x,3),nrow=3, ncol=3)
apply(xy, 1, FUN=paste, y, sep=",")
HTH,
Ivan
Le 11/8/2010 11:15, abotaha a écrit :
Hello,
I have two data.
x<-c(1, 2, 3)
y<-c(4,5,6)
How do i create matrix of 3 by 3 from this two, such that
(1,4) (1,5) (1,6)
(2,4) (2,5) (2,6)
(3,4) (3,5) (3,6)
I tried some thing like this:
xy<- as.data.frame(c(0,0,0), dim=c(3,3))
for(i in 1:3)
for(j in 1:3)
xy[i][j]<-c(x[i],y[j])
but i got errors..!!!!
any help would appreciate
--
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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