[R] Loop on vector name

[Megh Dal]

Thanks for this mail. It runs perfectly, but now I stuck on how to convert the result in a vector format for further matrix-compputation. e.g. How to convert "sapply(lis, sd)" to vector?



--- On Wed, 9/17/08, Dimitris Rizopoulos <d.rizopoulos at erasmusmc.nl> wrote:

> From: Dimitris Rizopoulos <d.rizopoulos at erasmusmc.nl>
> Subject: Re: [R] Loop on vector name
> To: megh700004 at yahoo.com
> Cc: r-help at stat.math.ethz.ch
> Date: Wednesday, September 17, 2008, 5:32 PM
> you need to get(), e.g., try this:
> 
> dat1 <- rnorm(5)
> dat2 <- rnorm(6)
> dat3 <- rnorm(7)
> 
> lis <- lapply(paste("dat", 1:3, sep =
> ""), get)
> lis
> sapply(lis, sd)
> 
> 
> I hope it helps.
> 
> Best,
> Dimitris
> 
> 
> Megh Dal wrote:
> > [My previous message rejected, therefore I am sending
> same one with some modification]
> > 
> > I have 3 vectors with object name : dat1, dat2, dat3
> > 
> > Now I want to create a loop, like :
> > 
> > for (i in 1:3)
> >    {
> >     cat(sd(dati))
> >    }
> > 
> > How I can do this in R?
> > 
> > Regards,
> > 
> > ______________________________________________
> > 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.
> > 
> 
> -- 
> 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