Re: [R] How to turn a string into a variable name ?

From: <Bill.Venables_at_csiro.au>
Date: Fri, 14 Mar 2008 14:39:49 +1000

I'm not sure why you would wish to do so, but it can be done:

> natural_nums <- 1:10
> even_nums <- seq(2,10, by = 2)
> types <- c("natural_nums", "even_nums")

> types <- lapply(types, as.name) ## list of variable names
> types

[[1]]
natural_nums

[[2]]
even_nums

> eval(types[[1]])

 [1] 1 2 3 4 5 6 7 8 9 10
> eval(types[[2]])

[1] 2 4 6 8 10

Bill Venables
CSIRO Laboratories
PO Box 120, Cleveland, 4163
AUSTRALIA

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mailto:Bill.Venables_at_csiro.au
http://www.cmis.csiro.au/bill.venables/

-----Original Message-----
From: r-help-bounces_at_r-project.org [mailto:r-help-bounces_at_r-project.org] On Behalf Of Ng Stanley
Sent: Friday, 14 March 2008 1:27 PM
To: r-help
Subject: [R] How to turn a string into a variable name ?

Hi,

For example,

natural_nums <- 1:10
even_nums <- seq(2,10, by = 2)
types <- c("natural_nums", "even_nums")

What functions can be performed on types[1] to turn it into a variable name
and not a string ?

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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. Received on Fri 14 Mar 2008 - 04:45:09 GMT

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