On 12-12-10 7:33 PM, Worik R wrote:
Let me restate my question.
Is there a straightforward way of ensuring I can use the variable name
USDCHF?
You can use any legal variable name. The only risk is that you will
overwrite some other variable that you created. You can't overwrite
variables from packages. (You might mask them, but they are still
accessible using the :: notation. E.g. after you set
USDCHF <- NULL
you can still access the one in timeSeries using
timeSeries::USDCHF
Is there a straight forward way of ensuring that when I delete
a variable by name I delete all copies in scope?
No. It is not straightforward to delete any variables other than the
ones that you created in the global environment.
Duncan Murdoch
Worik
On Tue, Dec 11, 2012 at 11:08 AM, Duncan Murdoch
<murdoch.dun...@gmail.com <mailto:murdoch.dun...@gmail.com>> wrote:
On 12-12-10 4:40 PM, Worik R wrote:
When I import the library timeSeries I get (at least) the
variable USDCHF
imported too.
I would like to delete it, but I cannot. As you can see below.
You didn't import timeSeries, you attached it. It is on your search
list; you can see the full list using search().
The first item on the search list is .GlobalEnv, the user's global
environment. You can create and delete items there. You can't
easily do so in the other items in the search list, they are
essentially read-only.
Clearly I am doing something wrong. What is it?
You need to learn more about how R does scoping. I don't think the
description in the Intro to R is sufficient; you probably need the R
Language Definition discussion (or a third party book).
Duncan Murdoch
library(timeSeries)
Loading required package: timeDate
class(USDCHF)
[1] "timeSeries"
attr(,"package")
[1] "timeSeries"
rm(list=c("USDCHF"))
Warning message:
In rm(list = c("USDCHF")) : object 'USDCHF' not found
rm(USDCHF)
Warning message:
In rm(USDCHF) : object 'USDCHF' not found
class(USDCHF)
[1] "timeSeries"
attr(,"package")
[1] "timeSeries"
I can assign to it...
USDCHF<-NULL
class(USDCHF)
[1] "NULL"
get("USDCHF")
NULL
Worik
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