一次加载多个包 [英] Load multiple packages at once
本文介绍了一次加载多个包的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
如何在不一遍又一遍地重新输入 require 命令的情况下一次加载一堆包?我尝试了三种方法，但都崩溃了.
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.
基本上，我想为将加载它们的函数提供一个包名称向量.
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)
推荐答案
你提议的函数的几个排列确实有效——但前提是你将 character.only 参数指定为 TRUE.快速示例:
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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