Re: [R] Create Variable names dynamically

From: jim holtman <jholtman_at_gmail.com>
Date: Thu, 31 Mar 2011 19:02:49 -0400

The best thing to do is to understand how to use 'list' for this purpose. Much easier to handle the information.

On Thu, Mar 31, 2011 at 4:42 PM, Noah Silverman <noah_at_smartmediacorp.com> wrote:
> Hi,
>
> I want to create variable names from within my code, but can't find any documentation for this.
>
> An example is probably the best way to illustrate. I am reading data in from a file, doing a bunch of stuff, and want to generate variables with my output.  (I could make a "list of lists" and name all the elements, but I really want separate variables.)
>
>
> #################
> #This is just a dummy example, please excuse any shortcuts...
>
> data <- read.table("file", ....)
> animals <- (data[,animal])
> animals
>> "cat", "dog", "horse"  # Not known what these are before I read the data file
>
> # do a bunch of stuff
>
> mean_cat <- abc
> var_cat <- dfd
> mean_dog <- 123
> var_dog <- 453
> etc..
> ##############
>
> I thought of trying to use the paste() function to create the variable name, but that doesn't work:
> for( animal in animals){
>        paste("mean", animal "_") <- 123
> }
>
> Any ideas???
>
> Thanks
>
>
> --
> Noah Silverman
>
> ______________________________________________
> 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.
>

-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?

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Received on Thu 31 Mar 2011 - 23:20:36 GMT

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