Tyler Rinker Tyler Rinker - 1 day ago 5
R Question

Load multiple packages at once

How can I load a bunch of packages at once with out retyping the require command over and over? I've tried three approaches all of which crash and burn.

Basically, I want to supply a vector of package names to a function that will load them.

x<-c("plyr", "psych", "tm")

require(x)
lapply(x, require)
do.call("require", x)

Answer

Several permutations of your proposed functions do work -- but only if you specify the character.only argument to be TRUE. Quick example:

lapply(x, require, character.only = TRUE)
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