Re: [R] enable object name to be called as object (a dataset)

2007-09-08 Thread Jim Price

a - 1:3
b - 11:13
c - 21:23

names - c('a','b','c')

do.call(data.frame, list(sapply(names, function(x) get(x



runner wrote:
 
 What I am trying to do is as follows:
 
 - I have listed names of all wanted objects (datasets A,B,C... ) in
 current workspace as a vector: 
 
 obj - c('A','B','C')
 
 - then i need to use these objects, say to extract all the 1st columns and
 bind to an existing dataset ('data'): 
  
 for ( i in 1:3){
 newdata - obj[i] 
 data - cbind(data,newdata [[1]] )
 }
 
 Obviously, it doesn't work since obj[i] is just a string of dataset name.
 Here is my question: how to call it as a original dataset? Thanks.
 

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[R] enable object name to be called as object (a dataset)

2007-09-07 Thread runner

What I am trying to do is as follows:

- I have listed names of all wanted objects (datasets A,B,C... ) in current
workspace as a vector: 

obj - c('A','B','C')

- then i need to use these objects, say to extract all the 1st columns and
bind to an existing dataset ('data'): 
 
for ( i in 1:3){
newdata - obj[i] 
data - cbind(data,newdata [[1]] )
}

Obviously, it doesn't work since obj[i] is just a string of dataset name.
Here is my question: how to call it as a original dataset? Thanks.
-- 
View this message in context: 
http://www.nabble.com/enable-object-name-to-be-called-as-object-%28a-dataset%29-tf4403933.html#a12563767
Sent from the R help mailing list archive at Nabble.com.

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and provide commented, minimal, self-contained, reproducible code.


Re: [R] enable object name to be called as object (a dataset)

2007-09-07 Thread Giovanni Petris

This should work:

do.call(cbind, lapply(1:length(obj), function(i) get(obj[i])[,1]))

Best,
Giovanni

 Date: Fri, 07 Sep 2007 14:42:07 -0700 (PDT)
 From: runner [EMAIL PROTECTED]
 Sender: [EMAIL PROTECTED]
 Precedence: list
 
 
 What I am trying to do is as follows:
 
 - I have listed names of all wanted objects (datasets A,B,C... ) in current
 workspace as a vector: 
 
 obj - c('A','B','C')
 
 - then i need to use these objects, say to extract all the 1st columns and
 bind to an existing dataset ('data'): 
  
 for ( i in 1:3){
 newdata - obj[i] 
 data - cbind(data,newdata [[1]] )
 }
 
 Obviously, it doesn't work since obj[i] is just a string of dataset name.
 Here is my question: how to call it as a original dataset? Thanks.
 -- 
 View this message in context: 
 http://www.nabble.com/enable-object-name-to-be-called-as-object-%28a-dataset%29-tf4403933.html#a12563767
 Sent from the R help mailing list archive at Nabble.com.
 
 __
 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.
 
 

-- 

Giovanni Petris  [EMAIL PROTECTED]
Associate Professor
Department of Mathematical Sciences
University of Arkansas - Fayetteville, AR 72701
Ph: (479) 575-6324, 575-8630 (fax)
http://definetti.uark.edu/~gpetris/

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and provide commented, minimal, self-contained, reproducible code.


Re: [R] enable object name to be called as object (a dataset)

2007-09-07 Thread Gabor Csardi
get might be good enough for you:

 a - 10
 name - a
 get(a)
[1] 10
 get(name)
[1] 10


Gabor

On Fri, Sep 07, 2007 at 02:42:07PM -0700, runner wrote:
 
 What I am trying to do is as follows:
 
 - I have listed names of all wanted objects (datasets A,B,C... ) in current
 workspace as a vector: 
 
 obj - c('A','B','C')
 
 - then i need to use these objects, say to extract all the 1st columns and
 bind to an existing dataset ('data'): 
  
 for ( i in 1:3){
 newdata - obj[i] 
 data - cbind(data,newdata [[1]] )
 }
 
 Obviously, it doesn't work since obj[i] is just a string of dataset name.
 Here is my question: how to call it as a original dataset? Thanks.
 -- 
 View this message in context: 
 http://www.nabble.com/enable-object-name-to-be-called-as-object-%28a-dataset%29-tf4403933.html#a12563767
 Sent from the R help mailing list archive at Nabble.com.
 
 __
 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.

-- 
Csardi Gabor [EMAIL PROTECTED]MTA RMKI, ELTE TTK

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