Re: [R] Loop on vector name
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 [EMAIL PROTECTED] wrote:
From: Dimitris Rizopoulos [EMAIL PROTECTED]
Subject: Re: [R] Loop on vector name
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
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@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
__
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Loop on vector name
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, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
From: [EMAIL PROTECTED] [EMAIL PROTECTED]
Subject: Re: [R] Loop on vector name
To: [EMAIL PROTECTED]
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
[EMAIL PROTECTED]
wrote:
From: Dimitris Rizopoulos
[EMAIL PROTECTED]
Subject: Re: [R] Loop on vector name
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
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@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@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@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.
Re: [R] Loop on vector name
Try this:
sapply(ls(patt=^dat[0-9]), function(x)sd(get(x)))
On Wed, Sep 17, 2008 at 8:50 AM, Megh Dal [EMAIL PROTECTED] 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@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.
--
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40 S 49° 16' 22 O
[[alternative HTML version deleted]]
__
R-help@r-project.org mailing list
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Re: [R] Loop on vector name
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@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@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.
Re: [R] Loop on vector name
Others have answered the question that you asked (it is also a variation of Faq
7.21), but here is an answer to the question that you should have asked:
When working with datasets like this, it is better to create a list rather than
separate objects with names like dat1, dat2, etc.
For example:
mydat - list(dat1=rnorm(10), dat2=rnorm(25), dat3=runif(100))
Now your loop can be:
for(i in 1:3) cat( sd( mydat[[i]] ) )
Or even simpler:
sapply( mydat, sd )
And when you are through with the data, you only need to delete one object, or
copy one object, or save one object, etc.
Hope this helps,
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
project.org] On Behalf Of Megh Dal
Sent: Wednesday, September 17, 2008 5:51 AM
To: [EMAIL PROTECTED]
Subject: [R] Loop on vector name
[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@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@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.
