Loop on vector name

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,

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

reproducible code.