If you are going to be doing this a lot, you may want to consider
making a little function. Here is an example 'do not remove'
function. It defaults to the global environment, but you can always
change it. Also, if you try to keep a variable name that does not
exist, it will throw an error and not remove anything. My assumption
is that when one of the names the user typed does not match a current
object, the user made a typo.
dnrm <- function(vars, envir = .GlobalEnv) {
vars <- c(vars, "dnrm")
keep <- match(x = vars, table = ls(envir = envir))
if(any(is.na(keep))) {
stop(paste("Some of the variables were not found in",
environmentName(envir)))
}
rm(list = ls(envir = envir)[-keep], envir = envir)
cat("Removed all but", length(keep), "objects from",
environmentName(envir), fill = TRUE)
}
Cheers,
Josh
On Mon, Aug 23, 2010 at 12:00 PM, Cheng Peng <cp...@usm.maine.edu> wrote:
>
> How to remove all R objects in the RAM except for a few specified ones?
> rm(list=ls()) removes all R objects in the R work space.
>
> Another question is that whether removing all R objects actually releases
> the RAM? Thanks.
> --
> View this message in context:
> http://r.789695.n4.nabble.com/How-to-remove-all-objects-except-a-few-specified-objects-tp2335651p2335651.html
> Sent from the R help mailing list archive at Nabble.com.
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
--
Joshua Wiley
Ph.D. Student, Health Psychology
University of California, Los Angeles
http://www.joshuawiley.com/
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