[R] Loop on vector name

[Megh Dal]

oh god!! I used lapply() instead sapply(). Now it is ok. Thank you so much. By the way after a long time I saw your post. Hope you are well and everything going on fine :)


--- On Fri, 9/19/08, markleeds at verizon.net <markleeds at verizon.net> wrote:

> From: markleeds at verizon.net <markleeds at verizon.net>
> Subject: Re: [R] Loop on vector name
> To: megh700004 at yahoo.com
> Date: Friday, September 19, 2008, 11:20 AM
> hi: i'm not sure if i'm understanding your question
> because the sapply 
> output is a vector. see below.
> 
> 
> dat1 <- rnorm(5)
> dat2 <- rnorm(6)
> dat3 <- rnorm(7)
> 
> lis <- lapply(paste("dat", 1:3, sep =
> ""), get)
> lis
> output <- sapply(lis, sd)
> print(output)
> print(str(output))
> 
> 
> 
> On Fri, Sep 19, 2008 at  1:44 AM, Megh Dal wrote:
> 
> > 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
> >
> > ______________________________________________
> > 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.