Re: [R] for loop in assigning column names
try
df.new <- cbind(df, ObJeCt[1:10])
names(df.new) <- c(names(df), paste("St", 1:10, sep = ""))
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: "Luis Ridao Cruz" <[EMAIL PROTECTED]>
To:
Sent: Wednesday, March 21, 2007 4:14 PM
Subject: [R] for loop in assigning column names
> R-help,
>
> I have a data frame (df) and I want to add some columns whose names
> should correspond to the "i" index in the loop below.
>
> for(i in 1:10)
> {
> df$eval(paste("St", as.character(i), sep = "" )) <- ObJeCt[i]
> }
>
> An error message comes out :
>
> "Error: attempt to apply non-function"
>
> How can I get around this?
>
> I could do something like :
>
> df$St2 <- NA
> df$St3 <- NA
> dft$St4 < -NA
> ..
>
> and afterwards assign the results of the loop above
> to the columns df$St2,df$St3,,,
>
> The problem is that my object "ObJeCt[i]" may change in size
> and definition and therefore a way to systematize the task would
> be desirable.
>
> Thanks in advance
>
>> version
> _
> platform i386-pc-mingw32
> arch i386
> os mingw32
> system i386, mingw32
> status
> major 2
> minor 4.1
> year 2006
> month 12
> day18
> svn rev40228
> language R
> version.string R version 2.4.1 (2006-12-18)
>
> __
> R-help@stat.math.ethz.ch 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
__
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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] for loop in assigning column names
Have you tried something like
df <- cbind(df, ObJeCT[, 1:10])
Cheers,
Thierry
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek / Reseach Institute for Nature
and Forest
Cel biometrie, methodologie en kwaliteitszorg / Section biometrics,
methodology and quality assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium
tel. + 32 54/436 185
[EMAIL PROTECTED]
www.inbo.be
Do not put your faith in what statistics say until you have carefully
considered what they do not say. ~William W. Watt
A statistical analysis, properly conducted, is a delicate dissection of
uncertainties, a surgery of suppositions. ~M.J.Moroney
> -Oorspronkelijk bericht-
> Van: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] Namens Luis Ridao Cruz
> Verzonden: woensdag 21 maart 2007 16:14
> Aan: r-help@stat.math.ethz.ch
> Onderwerp: [R] for loop in assigning column names
>
> R-help,
>
> I have a data frame (df) and I want to add some columns whose
> names should correspond to the "i" index in the loop below.
>
> for(i in 1:10)
> {
> df$eval(paste("St", as.character(i), sep = "" )) <- ObJeCt[i] }
>
> An error message comes out :
>
> "Error: attempt to apply non-function"
>
> How can I get around this?
>
> I could do something like :
>
> df$St2 <- NA
> df$St3 <- NA
> dft$St4 < -NA
> ..
>
> and afterwards assign the results of the loop above to the
> columns df$St2,df$St3,,,
>
> The problem is that my object "ObJeCt[i]" may change in size
> and definition and therefore a way to systematize the task
> would be desirable.
>
> Thanks in advance
>
> > version
>_
> platform i386-pc-mingw32
> arch i386
> os mingw32
> system i386, mingw32
> status
> major 2
> minor 4.1
> year 2006
> month 12
> day18
> svn rev40228
> language R
> version.string R version 2.4.1 (2006-12-18)
>
> __
> R-help@stat.math.ethz.ch 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@stat.math.ethz.ch 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] for loop in assigning column names
R-help,
I have a data frame (df) and I want to add some columns whose names
should correspond to the "i" index in the loop below.
for(i in 1:10)
{
df$eval(paste("St", as.character(i), sep = "" )) <- ObJeCt[i]
}
An error message comes out :
"Error: attempt to apply non-function"
How can I get around this?
I could do something like :
df$St2 <- NA
df$St3 <- NA
dft$St4 < -NA
..
and afterwards assign the results of the loop above
to the columns df$St2,df$St3,,,
The problem is that my object "ObJeCt[i]" may change in size
and definition and therefore a way to systematize the task would
be desirable.
Thanks in advance
> version
_
platform i386-pc-mingw32
arch i386
os mingw32
system i386, mingw32
status
major 2
minor 4.1
year 2006
month 12
day18
svn rev40228
language R
version.string R version 2.4.1 (2006-12-18)
__
R-help@stat.math.ethz.ch 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.
