创建与模式匹配的数据框列表

Question

这是一个非常简单的问题,但我似乎无法提出答案.我想创建一个data frames匹配模式的列表,然后rm从全局环境中创建.

匹配的模式是' water_land_by_owntype_*'

这是我试过的,但它不起作用...我想b/c它不知道在哪里搜索字符串.

rm (matches <- list(
    grep('water_land_by_owntype_*')))

-al

Answer 1

嗨你可以这样做:

# Create some data.frame
water_land_by_owntype_1 <- mtcars
water_land_by_owntype_2 <- mtcars
water_land_by_owntype_3 <- mtcars
water_land_by_owntype_4 <- mtcars
water_land_by_owntype_5 <- mtcars

# Put them in a list
water_land_by_owntype <- lapply(ls(pattern = "water_land_by_owntype_.*"), get)

# or more directly
water_land_by_owntype <- mget(ls(pattern = "water_land_by_owntype_.*"))

# Delete them
rm(list = ls(pattern = "water_land_by_owntype_.*"))