[R] Lubridate and NameSpace

[peter dalgaard]

> On 01 Mar 2015, at 00:32 , Roy Mendelssohn - NOAA Federal <roy.mendelssohn at noaa.gov> wrote:
> 
>> lubridate::%m+%

Actually trying it would have revealed

> lubridate::%m+%
Error: unexpected SPECIAL in "lubridate::%m+%"

Notice that this is a syntactical problem, not a semantic one; you cannot juxtapose two operators (:: and %m+%). Quoting is needed. Either of the following seems to work:

lubridate::"%m+%"
lubridate::`%m+%`

In the same vein, notice that the result of the above is not an operator unless assigned to something of the form %foo%. I.e.

lubridate::`%m+%`(a,b)
f <- lubridate::`%m+%`
f(a,b)
`%mym+%` <- f
a %mym+% b


-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com