[R] How to use the paste function to create an already used variable

[David Winsemius]

On Mar 24, 2010, at 9:25 AM, Tal Galili wrote:

> Try:
>
> for (i in 1:4) {
> Data <- eval(parse(text =  paste("data",i,sep="")))
> ...
> ..
> }
>
>
> (and if there are other solutions - I would love to know)

Well, it's not actually a solution since the first three fetched  
values would have been overwritten.

Instead:

  Data <- list()
  for (i in 1:4) {
        Data[[i]] <- eval(parse(text =  paste("data",i,sep=""))) }
>
>
>
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>
> 2010/3/24 "Biedermann, Jürgen" <juergen.biedermann at charite.de>
>
>> Hi there,
>>
>> I have the following problem
>>
>> Four data frames exist:
>>
>> data1
>> data2
>> data3
>> data4
>>
>> Now I want to write a loop and temporarily store the data1, data2,  
>> data3,
>> data4 in a variable called data.
>> I tried the following...
>>
>> for (i in 1:4) {
>> Data <- paste("data",i,sep="")
>> ...
>> ..
>> }
>>
>>
>> but it doesn't function. I think the problem is the definition of  
>> the mode
>> of the pasted variable.
>>
>> Could anyone help me?
>> Thanks
>>
>> Greetings
>> Jürgen
>>
>> ______________________________________________
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>> 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.
>>
>
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>
> ______________________________________________
> R-help at 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.

David Winsemius, MD
West Hartford, CT