Dear all,
I want to concatenate the elements of two vectors such as
a<-c("a1","a2")
b<-c("b1","b2")
and obtain
"a1b1", "a1b2","a2b1","a2b2"
I tried the paste and paste0 functions, but they yielded elementwise
concatenation such as
"a1b1","a2b2"
I am wondering that is there an efficient way of doing my wish, for instance
without using for loop etc.
Best
Ozgur
--
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concatenating two vectors
5 messages · Özgür Asar, Jorge I Velez, R. Michael Weylandt +2 more
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On Fri, Sep 14, 2012 at 1:54 PM, ?zg?r Asar <oasar at metu.edu.tr> wrote:
Dear all,
I want to concatenate the elements of two vectors such as
a<-c("a1","a2")
b<-c("b1","b2")
and obtain
"a1b1", "a1b2","a2b1","a2b2"
I tried the paste and paste0 functions, but they yielded elementwise
concatenation such as
"a1b1","a2b2"
I am wondering that is there an efficient way of doing my wish, for instance
without using for loop etc.
This is in the general frame of things which look like 'outer' (or Cartesian) products so you'll want to use the outer() function. I believe outer(a, b, FUN = paste0) should work. Cheers, Michael
Best Ozgur -- View this message in context: http://r.789695.n4.nabble.com/concatenating-two-vectors-tp4643139.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.
Hi,
Try this:
?paste0(expand.grid(a,b)$Var1,expand.grid(a,b)$Var2)
[1] "a1b1" "a2b1" "a1b2" "a2b2"
A.K.
----- Original Message -----
From: ?zg?r Asar <oasar at metu.edu.tr>
To: r-help at r-project.org
Cc:
Sent: Friday, September 14, 2012 8:54 AM
Subject: [R] concatenating two vectors
Dear all,
I want to concatenate the elements of two vectors such as
a<-c("a1","a2")
b<-c("b1","b2")
and obtain
"a1b1", "a1b2","a2b1","a2b2"
I tried the paste and paste0 functions, but they yielded elementwise
concatenation such as
"a1b1","a2b2"
I am wondering that is there an efficient way of doing my wish, for instance
without using for loop etc.
Best
Ozgur
--
View this message in context: http://r.789695.n4.nabble.com/concatenating-two-vectors-tp4643139.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.
On 14-09-2012, at 14:54, ?zg?r Asar wrote:
Dear all,
I want to concatenate the elements of two vectors such as
a<-c("a1","a2")
b<-c("b1","b2")
and obtain
"a1b1", "a1b2","a2b1","a2b2"
I tried the paste and paste0 functions, but they yielded elementwise
concatenation such as
This is also an option sort(outer(a,b,paste0)) Berend