create sequences from two "from" and "to" vectors

5 messages · Dimitris Rizopoulos, Marc Schwartz, Yasir Kaheil +1 more

Original

1

5

Yasir Kaheil

Fri, Jan 9, 2009 12:42 PM #

hi all,
how can I create sequences that start from a known vector, say x1 and end
with another say x2- also suppose all the sequences will be the same length.
I don't want to use a for loop
x1<-c(1,2,3,4); x2<-(3,4,5,6);
what I want is 
1 2 3 4 
2 3 4 5
3 4 5 6

Thanks

-----
Yasir H. Kaheil
Columbia University

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Dimitris Rizopoulos

Fri, Jan 9, 2009 12:47 PM #

one way is using mapply(), e.g.,

mapply(":", 1:4, 3:6)


I hope it helps.

Best,
Dimitris

Yasir Kaheil wrote:

Dimitris Rizopoulos
Assistant Professor
Department of Biostatistics
Erasmus Medical Center

Address: PO Box 2040, 3000 CA Rotterdam, the Netherlands
Tel: +31/(0)10/7043478
Fax: +31/(0)10/7043014

Fri, Jan 9, 2009 12:48 PM #

on 01/09/2009 02:42 PM Yasir Kaheil wrote:

[,1] [,2] [,3] [,4]
[1,]    1    2    3    4
[2,]    2    3    4    5
[3,]    3    4    5    6



See ?mapply

HTH,

Marc Schwartz

Yasir Kaheil

Fri, Jan 9, 2009 12:50 PM #

Great! thank you so much!

Dimitris Rizopoulos-4 wrote:

______________________________________________
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.

-----
Yasir H. Kaheil
Columbia University

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Greg Snow

Fri, Jan 9, 2009 4:17 PM #

Try:

[,1] [,2] [,3] [,4]
[1,]    1    2    3    4
[2,]    2    3    4    5
[3,]    3    4    5    6
[4,]    4    5    6    7
[5,]    5    6    7    8
[6,]    6    7    8    9
[7,]    7    8    9   10

Is that what you want?

Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Yasir Kaheil
> Sent: Friday, January 09, 2009 1:43 PM
> To: r-help at r-project.org
> Subject: [R] create sequences from two "from" and "to" vectors
> 
> 
> hi all,
> how can I create sequences that start from a known vector, say x1 and
> end
> with another say x2- also suppose all the sequences will be the same
> length.
> I don't want to use a for loop
> x1<-c(1,2,3,4); x2<-(3,4,5,6);
> what I want is
> 1 2 3 4
> 2 3 4 5
> 3 4 5 6
> 
> Thanks
> 
> -----
> Yasir H. Kaheil
> Columbia University
> --
> View this message in context: http://www.nabble.com/create-sequences-
> from-two-%22from%22-and-%22to%22-vectors-tp21380194p21380194.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.