load.Rdata 文件到 list()

Question

In R, load(file = "file.Rdata") will load all the variables as global variables. Is it possible to load all the variables contained in the.Rdata file into a list, so that it won't spoil the global variable space?

Answer 1

You could assign it to a new environment and from there convert it into a list:

load("file.Rdata",  temp_env <- new.env())
env_list <- as.list(temp_env)

Answer 2

Using load inside mget with other envir= onment than the .GlobalEnv .

d1 <- d2 <- d3  <- d4 <- data.frame()
save(d1, d2, d3, d4, file="test.rda")
rm(d1, d2, d3, d4)

x <- mget(load("test.rda", envir=(NE. <- new.env())), envir=NE.)
ls()
# [1] "NE." "x" 
x
# $d1
# data frame with 0 columns and 0 rows
# 
# $d2
# data frame with 0 columns and 0 rows
# 
# $d3
# data frame with 0 columns and 0 rows
# 
# $d4
# data frame with 0 columns and 0 rows