'Require' returns uninformative error if package is already loaded [minor]

[tati-micheletti]

reprex:

reproducible::Require(raster) # works fine
reproducible::Require(raster) # Error in Require(raster) : packages should be a character vector or a name

[eliotmcintire]

That is actually very imformative, and solves your problem:

reproducible::Require(raster) # works fine
reproducible::Require(raster) # Error in Require(raster) : packages should be a character vector or a name
reproducible::Require("raster") # works fine, with no error or message

It "tries" the first time to use the "object" called raster... since it does not exist, it tries to interpret it as a character string. The second time, the package is loaded, so the "object" called raster does exist. So, it tries to load that object (it is the function raster::raster). The third, and correct time, is the best way to always load a library/package in R. It does "work" in base R to use require(raster) ... but that not great for Require for some other reasons.