[R] use of NULL environment is deprecated?
murdoch at stats.uwo.ca
Wed Jul 12 00:41:11 CEST 2006
On 7/11/2006 6:27 PM, Patrick Connolly wrote:
> ]> version
> platform x86_64-unknown-linux-gnu
> arch x86_64
> os linux-gnu
> system x86_64, linux-gnu
> major 2
> minor 3.1
> year 2006
> month 06
> day 01
> svn rev 38247
> language R
> version.string Version 2.3.1 (2006-06-01)
> I see in the NEWS file the line:
> o Use of NULL as an environment is deprecated and gives a warning.
> Which duly happens. I get warnings like this:
>> Warning message:
> use of NULL environment is deprecated
> My problem is that I don't know what is being referred to. A little
> birdie tells me that in later versions of R, those warnings will
> become errors so I need to work out where they're coming from before I
> can use later versions.
> My question is: How does one work out which is being referred to by
> such a message? The traceback() function is useful when failure
> occurs. Is there an analagous way of looking into warnings?
options(warn=2) will convert warnings into errors, so traceback will work.
A common situation where I've seen that error is with binary saves from
earlier versions of R being loaded into current versions. For example,
if you installed a package before, but didn't re-install it with 2.3.1,
or if you are reloading a workspace saved in an earlier version.
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