如何将dplyr过滤器应用于数据帧列表? [英] How to apply dplyr filter to list of data frames?

问题描述

我有一个list()数据帧.我想将dplyr的filter()应用于所有这些对象.

I have a list() of dataframes. I want to apply dplyr's filter() to all of them.

到目前为止我尝试过的示例代码...

Example code of what I have tried so far...

require(dplyr)
list.DFs <- list(df1,df2)
lapply(
  X = list.DFS,
  FUN = filter(Gold.fish.count=="Total")
)

但这会导致错误:Object 'Gold.fish.count' not found.

推荐答案

使用purrr

library(purrr)
map(list.DFs, ~filter(.x, Gold.fish.count == "Total"))

显然，您可以对lapply进行完全相同的操作:

Obviously, you can do exactly the same with lapply:

lapply(list.DFs, function(x) filter(x, Gold.fish.count == "Total"))

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