Re: [R] Help needed in R

From: Heinz Tuechler <tuechler_at_gmx.at>
Date: Sat, 01 Mar 2008 23:32:56 +0100

At 23:07 01.03.2008, AbouEl-Makarim Aboueissa wrote:
>Dear ALL:
>
>I have two quick questions about how to perform some steps in R.
>Could you please see the attached MS file if the data not clean
>enough in this email.
>
>Thank you so much for all your helps.
>
>
>Abou
>
>
>
>Here it is:
>=========================
>
>Consider the following matrix:
>
>data<-matrix(c(2,2,12,2,1,10,10,4,10,1,1,2,2,1,2,10,3,1,1,1,3,5,17,23,9,9,3,3,15,5,
> 4,5,5,5,4,8,1,15,3,3,1,6,3,6,3,4,5,14,4,
>
>0,0,0,0,0,1,1,0,1,1,0,1,1,0,0,1,0,1,0,0,0,1,0,0,0,0,0,0,1,1,0,1,1,1,0,
> 0,0,0,0,0,0,0,0,0,0,0,0,0,0),49,2)
>
>
> [,1] [,2]
> [1,] 2 0
> [2,] 2 0
> [3,] 12 0
> [4,] 2 0
> [5,] 1 0
> [6,] 10 1
> [7,] 10 1
> [8,] 4 0
> [9,] 10 1
>[10,] 1 1
>[11,] 1 0
>[12,] 2 1
>[13,] 2 1
>[14,] 1 0
>[15,] 2 0
>[16,] 10 1
>[17,] 3 0
>[18,] 1 1
>[19,] 1 0
>[20,] 1 0
>[21,] 3 0
>[22,] 5 1
>[23,] 17 0
>[24,] 23 0
>[25,] 9 0
>[26,] 9 0
>[27,] 3 0
>[28,] 3 0
>[29,] 15 1
>[30,] 5 1
>[31,] 4 0
>[32,] 5 1
>[33,] 5 1
>[34,] 5 1
>[35,] 4 0
>[36,] 8 0
>[37,] 1 0
>[38,] 15 0
>[39,] 3 0
>[40,] 3 0
>[41,] 1 0
>[42,] 6 0
>[43,] 3 0
>[44,] 6 0
>[45,] 3 0
>[46,] 4 0
>[47,] 5 0
>[48,] 14 0
>[49,] 4 0
>
>
>
>
>
>Q1. Column one is the data set, and column two is an indicator of 1
>and 0. Some values
> in column one corresponding to indicator 1 in column two
> are different, and some
> are the same. There are 5 different groups of values in
> column one with indicator 1
> in column two.
>
>(a) How I can choose only one value (only one observation) from each
>of these groups to
> develop a vector of length 5 as: (1 2 5 10 15).
>

table1 <- table(data[data[, 2]==1, 1])

as.numeric(dimnames(table1)[[1]])

[1] 1 2 5 10 15

>(b) How I can find number of observations in each of these groups as
>a vector as:
> (2 2 5 4 1).
>

as.vector(table1)

[1] 2 2 5 4 1

greetings

Heinz

>These are the values with indicator 1.
>
> [,1] [,2]
> [1,] 1 1
> [2,] 1 1
> [3,] 2 1
> [4,] 2 1
> [5,] 5 1
> [6,] 5 1
> [7,] 5 1
> [8,] 5 1
> [9,] 5 1
>[10,] 10 1
>[11,] 10 1
>[12,] 10 1
>[13,] 10 1
>[14,] 15 1
>
>=====================
>
>
>
>
>
>==========================
>AbouEl-Makarim Aboueissa, Ph.D.
>Assistant Professor of Statistics
>Department of Mathematics & Statistics
>University of Southern Maine
>96 Falmouth Street
>P.O. Box 9300
>Portland, ME 04104-9300
>
>Tel: (207) 228-8389
>Fax: (207) 780-5607
>Email: aaboueissa_at_usm.maine.edu
> aboueiss_at_yahoo.com
>Office: 301C Payson Smith
>
>
>
>______________________________________________
>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.



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. Received on Sat 01 Mar 2008 - 22:38:15 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Sat 01 Mar 2008 - 23:30:18 GMT.

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

list of date sections of archive