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 ?
[[alternative HTML version deleted]]
You may be looking for the get function. See ?get Ng Stanley wrote:> 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 ? > > [[alternative HTML version deleted]] > > ______________________________________________ > 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.
Bill.Venables at csiro.au
2008-Mar-14 04:39 UTC
[R] How to turn a string into a variable name ?
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 Office Phone (email preferred): +61 7 3826 7251 Fax (if absolutely necessary): +61 7 3826 7304 Mobile: +61 4 8819 4402 Home Phone: +61 7 3286 7700 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 ? [[alternative HTML version deleted]] ______________________________________________ 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.