function naming conflicts

问题

What are some good patterns for development with packages that define the same function? In my case, lubridate and data.table both define wday.

回答1:

You can use ::, it helps to specify which package to use:

lubridate::wday
function (x, label = FALSE, abbr = TRUE) 
UseMethod("wday")
<environment: namespace:lubridate>

data.table::wday
function (x) 
as.POSIXlt(x)$wday + 1L
<environment: namespace:data.table>

回答2:

Use the namespace mechanism for your packages. See the R Extensions manual.

来源：https://stackoverflow.com/questions/11490359/function-naming-conflicts