删除出现 x 次 R 的 ID [英] remove IDs that occur x times R

问题描述

我有一个 df，我想删除 df 中行数少于 X 的人.例如，在这个玩具示例中，我想保留 >= 5 行的人.

I have a df and I would like to remove people who have less than X amount of rows in df. E.g., in this toy example, I would like to retain people who have >= 5 rows.

df
   names  fruit
4   john   kiwi
7   john  apple
9   john banana
13  john orange
14  john  apple
2   mary orange
5   mary  apple
8   mary orange
10  mary  apple
12  mary  apple
1    tom  apple
3    tom banana
6    tom  apple
11   tom   kiwi

示例输出

df
   names  fruit
4   john   kiwi
7   john  apple
9   john banana
13  john orange
14  john  apple
2   mary orange
5   mary  apple
8   mary orange
10  mary  apple
12  mary  apple

提前致谢！

推荐答案

你可以像这样使用table:

df[df$names %in% names(table(df$names))[table(df$names) >= 5],]

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