搬入環境

Question

我想問一下，是否有一種功能將我們帶入環境。 例如：

# create two environments 
Env1 <- new.env() 
Env2 <- new.env() 

# assign one variable into each environment 
assign("v1", "1", envir = Env1) 
assign("v2", "2", envir = Env2) 

# In order to refer to the variable in Env2 I have to use Env2$v2, for example 
print(Env2$v2) 

# The question is if there is some function that sents us into Env2 
# so that when we refer to the variable in Env2 to use just v2, that is 
print(v2) 

謝謝大家

Answer 1

根據你所說的「是指變量，」 attach做到這一點的：

attach(Env2) 
print(v2) 
## [1] "2" 

detach() 
print(v2) 
## Error in print(v2) : object 'v2' not found 

試圖修改的值是不同的故事，因爲它附加在位置2.