For the data:

```
Id res
1 9
1 8
1 8
1 6
1 5
1 4
2 6
2 6
2 0
2 0
2 0
2 0
```

I want top four from each group. When I use

```
dat %>% group_by(Id) %>%
top_n(4,res)
```

I get

```
Id res
1 9
1 8
1 8
1 6
2 6
2 6
2 0
2 0
2 0
2 0
```

A filter method is required here. What would be a proper filter logic for this, so that I get only top four rows (ties are allowed)

Answer:

As far as I know `top_n`

returns more rows if ties.

Maybe this helps?

```
dat %>% group_by(Id) %>% arrange(desc(res)) %>% filter(row_number()<=4)
Id res
1 1 9
2 1 8
3 1 8
4 1 6
5 2 6
6 2 6
7 2 0
8 2 0
```

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