Re: [R] Modifying the embed-results

From: Atte Tenkanen <attenka_at_utu.fi>
Date: Sat 26 Aug 2006 - 16:13:47 EST

Again my example was't very clear: there were not enough same numbers in the VECTOR. What I need is something like this:

VECTOR<-c(0,3,6,3,11,2,11,4,3,4,7,7,6,4,8) MATRIX<-c()
for(i in 1:length(VECTOR)){

	v<-(unique(VECTOR[i:length(VECTOR)])[1:5])
	MATRIX<-rbind(MATRIX,v)

}

MATRIX<-na.omit(MATRIX)
MATRIX
> data.frame(MATRIX, row.names=NULL)
  X1 X2 X3 X4 X5

1       0  3  6 11  2
2       3  6 11  2  4
3       6  3 11  2  4
4       3 11  2  4  7
5      11  2  4  3  7
6       2 11  4  3  7
7      11  4  3  7  6
8       4  3  7  6  8
9       3  4  7  6  8

So, there are no duplicates in rows.
VECTOR is always scanned forward as long as the number of items (here 5) becomes full.

Atte

> Try:
>
> embed(VECTOR, 5)[,5:1]
>
> On 8/25/06, Atte Tenkanen <attenka@utu.fi> wrote:
> > Hi,
> >
> > Here is a vector and the result from the embed-command:
> >
> > VECTOR=c(0,3,6,3,11,2,4,3,7,6,4,5,10,2,3,5,8)
> >
> > > embed(VECTOR, dimension=5)
> > [,1] [,2] [,3] [,4] [,5]
> > [1,] 11 3 6 3 0
> > [2,] 2 11 3 6 3
> > [3,] 4 2 11 3 6
> > [4,] 3 4 2 11 3
> > [5,] 7 3 4 2 11
> > [6,] 6 7 3 4 2
> > [7,] 4 6 7 3 4
> > [8,] 5 4 6 7 3
> > [9,] 10 5 4 6 7
> > [10,] 2 10 5 4 6
> > [11,] 3 2 10 5 4
> > [12,] 5 3 2 10 5
> > [13,] 8 5 3 2 10
> >
> > Is there a way to little modify the algorithm so that the result
> looks> like this:
> >
> > [1] 0 3 6 11 2 <- beginning from the first number of the VECTOR
> > [1] 3 6 11 2 4 <- beginning from the second number of the
> VECTOR etc
> > [1] 6 3 11 2 4
> > [1] 3 11 2 4 7
> > [1] 11 2 4 3 7
> > [1] 2 4 3 7 6
> > [1] 4 3 7 6 5
> > [1] 3 7 6 4 5
> > [1] 7 6 4 5 10
> > [1] 6 4 5 10 2
> > [1] 4 5 10 2 3
> > [1] 5 10 2 3 8
> > [1] 10 2 3 5 8
> >
> > Every row consists of next five unique(!) member of the VECTOR. I
> made> this example result with a time consuming algorithm which
> uses for-loops
> > and whiles.
> >
> > How to do this better??
> >
> > Thanks in advance!
> >
> > Atte Tenkanen
> > University of Turku
> >
> > ______________________________________________
> > R-help@stat.math.ethz.ch 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.
> >
>



R-help@stat.math.ethz.ch 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. Received on Sat Aug 26 16:28:34 2006

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.1.8, at Sun 27 Aug 2006 - 00:23:30 EST.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.