[R] Version Upgrade and Packages

[David Winsemius]

On Mar 4, 2013, at 8:28 AM, Rich Shepard wrote:

> On Mon, 4 Mar 2013, MacQueen, Don wrote:
> 
>> Immediately after you see one of those messages, do, e.g.,
>> 
>> find('cor')
> 
>> It should tell you that you have more than one object named 'cor' in your
>> search path, and where they all are. Then you can decide if it's what you
>> want (probably not, but can't say from here).
> 
> Don,
> 
>  find doesn't because these are apparently not individual files. So I run
> egrep -R 'cor' * or egrep -R 'as.Date' * within /usr/lib/R/library and see
> many instances of where these strings are used. Many are in help files.
> Others are used in different libraries; for example:

Don assumed you were in an R session. The `find` function in R takes a character argument. You did not produce the entire message because you should have seen immediately above that message the name of  a package being loaded (in this case most likely as part of the startup process)

?Startup

In my ,Rprofile I load both package:sos and package:utils and I see this at startupo:
-------
Attaching package: ‘utils’

The following object(s) are masked from ‘package:sos’:

    ?
------------

So the sos function '?' is masked by the utils function named '?'

> 
> gdata/unitTests/runit.getDateTimeParts.R:cDate <- as.Date(tDate)
> 
> plyr/tests/test-rbind.r:    d = as.Date(c("2008-01-01", "2009-01-01",
> "2010-01-01")))
> 
> spacetime/demo/gvis.R:	rural_PM10$time == as.Date("2003-12-31"))
> 
> timeDate/unitTests/runit.SpecialDates.R:    dts <- as.Date(ch.dts)
> 
> zoo/NAMESPACE:   "as.Date",
> 
>  I'm not seeing code for as.Date, as.Date.numeric, or cor in multiple
> libraries.

Please read Uwe Ligges' excellent article regarding finding R code:

http://cran.r-project.org/doc/Rnews/Rnews_2006-4.pdf

-- 

David Winsemius
Alameda, CA, USA