[R] Question about simulation design...

Peter Alspach Peter.Alspach at plantandfood.co.nz
Thu Nov 12 20:36:12 CET 2009


Tena koe Jeff

Try something like:

for (i in 1:n)
{
  assign(paste('data', i, sep=''), read.table(paste('data', i, '.dat',
sep=''), header=F)) 
  .
  .
  .
}

HTH ....

Peter Alspach

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Jeff Harring
> Sent: Friday, 13 November 2009 2:22 a.m.
> To: r-help at r-project.org
> Subject: [R] Question about simulation design...
> 
> Help R list servers,
> 
> I have 500 external data sets for a simulation study that I 
> would like to bring into R to analyze. They have the names 
> data1.dat, data2.dat, ..., dataN.dat
> 
> Is there a way to automatize the bringing in of these data 
> sets in R using the read.table function within a looping cycle?
> 
> For example...
> 
> for (j in 1:N){
> data_"j" = read.table("data"j".dat, header=F)
> 
> executable code
> .
> .
> .
> }
> 
> bring in the next data set.
> 
> SAS uses a ampersand "&" to automatize the process.
> 
> Example code:
> 
> data _NULL_;
>     set final;
>         filename out "C:\data&k..dat";
>         file out;
>         put variables;
> run;
> 
> I would welcome any insight into how to address this issue.
> 
> Thank you.
> Jeff Harring
> 
> --
> **********************************************************
> Jeffrey R. Harring, Assistant Professor
> Department of Measurement, Statistics & Evaluation (EDMS) 
> 1230 Benjamin Building University of Maryland College Park, 
> MD 20742-1115
> 
> Phone: 	301.405.3630
> Fax: 	301.314.9245
> Email: 	harring at umd.edu
> Web:  	
> http://www.education.umd.edu/EDMS/fac/Harring/webpage.html
> 
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> 



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