Displaying 1 result from an estimated 1 matches for "tp23417208p23437592".
2009 May 06
6
by-group processing
Given a dataframe like
> data
ID Type N
1 45900 A 1
2 45900 B 2
3 45900 C 3
4 45900 D 4
5 45900 E 5
6 45900 F 6
7 45900 I 7
8 49270 A 1
9 49270 B 2
10 49270 E 3
18 46550 A 1
19 46550 B 2
20 46550 C 3
21 46550 D 4
22 46550 E 5
23 46550 F 6
24 46550 I 7
>
containing an identifier (ID), a