5 messages · ADias, David Winsemius, Petr Savicky +1 more
Hi
Suppose we have an object with strings:
A<-c("a","b","c","d")
Now I do:
B<-matrix(A,4,4, byrow=F)
and I get
a a a a
b b b b
c c c c
d d d d
But what I really want is:
a b c d
b c d a
c d a b
d a b c
How can I do this?
thank you
A. Dias
View this message in context: http://r.789695.n4.nabble.com/Creating-a-Matrix-from-a-vector-with-some-conditions-tp3178219p3178219.html Sent from the R help mailing list archive at Nabble.com.
Hi
Suppose we have an object with strings:
A<-c("a","b","c","d")
Now I do:
B<-matrix(A,4,4, byrow=F)
and I get
a a a a
b b b b
c c c c
d d d d
But what I really want is:
a b c d
b c d a
c d a b
d a b c
How can I do this?
How else? B<-matrix(A,4,4, byrow=TRUE)
thank you A. Dias -- View this message in context: http://r.789695.n4.nabble.com/Creating-a-Matrix-from-a-vector-with-some-conditions-tp3178219p3178219.html Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
David Winsemius, MD West Hartford, CT
Hi
Suppose we have an object with strings:
A<-c("a","b","c","d")
Now I do:
B<-matrix(A,4,4, byrow=F)
and I get
a a a a
b b b b
c c c c
d d d d
But what I really want is:
a b c d
b c d a
c d a b
d a b c
How can I do this?
Try the following
A <- c("a","b","c","d")
B <- matrix(A, 5, 4)[1:4, ]
# [,1] [,2] [,3] [,4]
#[1,] "a" "b" "c" "d"
#[2,] "b" "c" "d" "a"
#[3,] "c" "d" "a" "b"
#[4,] "d" "a" "b" "c"
Petr Savicky.
Hi
Suppose we have an object with strings:
A<-c("a","b","c","d")
Now I do:
B<-matrix(A,4,4, byrow=F)
and I get
a a a a
b b b b
c c c c
d d d d
But what I really want is:
a b c d
b c d a
c d a b
d a b c
How can I do this?
Try the following
v <- rep(c("a", "b", "c", "d"), times=2)
a <- matrix(nrow=4, ncol=4)
a[, ] <- v[row(a) + col(a) - 1]
a
[,1] [,2] [,3] [,4]
[1,] "a" "b" "c" "d"
[2,] "b" "c" "d" "a"
[3,] "c" "d" "a" "b"
[4,] "d" "a" "b" "c"
Petr Savicky.
Hi, embed() seemed well-suited, but I couldn't figure out an elegant way to use it embed(c(A,A), 4)[1:4, 4:1] HTH, baptiste
Hi
Suppose we have an object with strings:
A<-c("a","b","c","d")
Now I do:
B<-matrix(A,4,4, byrow=F)
and I get
a a a a
b b b b
c c c c
d d d d
But what I really want is:
a b c d
b c d a
c d a b
d a b c
How can I do this?
thank you
A. Dias
--
View this message in context: http://r.789695.n4.nabble.com/Creating-a-Matrix-from-a-vector-with-some-conditions-tp3178219p3178219.html
Sent from the R help mailing list archive at Nabble.com.
______________________________________________ R-help at r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.