[R] Conditional rows

[Dimitris Rizopoulos]

do you mean the following:

test <- matrix(c(0.1, 0.2, 0.1, 0.2,
    0.1, 0.1, 0.3, 0.1, 0.1), 3, 3)

ind <- rowSums(test <= 0.2) == nrow(test)
ind
which(ind)


I hope it helps.

Best,
Dimitris

----
Dimitris Rizopoulos
Ph.D. Student
Biostatistical Centre
School of Public Health
Catholic University of Leuven

Address: Kapucijnenvoer 35, Leuven, Belgium
Tel: +32/(0)16/336899
Fax: +32/(0)16/337015
Web: http://med.kuleuven.be/biostat/
     http://www.student.kuleuven.be/~m0390867/dimitris.htm


----- Original Message ----- 
From: "Ng Stanley" <stanleyngkl at gmail.com>
To: "r-help" <r-help at r-project.org>
Sent: Monday, February 11, 2008 11:22 AM
Subject: [R] Conditional rows


> Hi,
>
> Given a simple example,  test <- matrix(c(0.1, 0.2, 0.1, 0.2, 0.1, 
> 0.1, 0.3,
> 0.1, 0.1), 3, 3)
>
> How to generate row indexes for which their corresponding row values 
> are
> less than or equal to 0.2 ? For this example, row 2 and 3 are the 
> correct
> ones.
>
> Thanks
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
> 


Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm