当我知道某个时间间隔的开始和结束记录时，该如何识别属于该时间间隔的记录？ （右）
[英]How to identify the records that belong to a certain time interval when I know the start and end records of that interval? (R)
问题描述
So, here is my problem. 
所以，这是我的问题。 I have a dataset of locations of radiotagged hummingbirds I've been following as part of my thesis. 作为论文的一部分，我有一个一直跟踪着放射性标记的蜂鸟位置的数据集。 As you might imagine, they fly fast so there were intervals when I lost track of where they were until I eventually found them again. 就像您想象的那样，它们飞得很快，所以当我不知道它们在哪里之前，有时会有间隔，直到我最终再次找到它们。 Now I am trying to identify the segments where the bird was followed continuously (ie, the intervals between “Lost” periods). 现在，我试图确定连续跟踪鸟类的区域（即“失落”时间段之间的间隔）。
ID Type TimeStart TimeEnd Limiter Starter Ender
1 Observed 6:45:00 6:45:00 NO Start End
2 Lost 6:45:00 5:31:00 YES NO NO
3 Observed 5:31:00 5:31:00 NO Start NO
4 Observed 9:48:00 9:48:00 NO NO NO
5 Observed 10:02:00 10:02:00 NO NO NO
6 Observed 10:18:00 10:18:00 NO NO NO
7 Observed 11:00:00 11:00:00 NO NO NO
8 Observed 13:15:00 13:15:00 NO NO NO
9 Observed 13:34:00 13:34:00 NO NO NO
10 Observed 13:43:00 13:43:00 NO NO NO
11 Observed 13:52:00 13:52:00 NO NO NO
12 Observed 14:25:00 14:25:00 NO NO NO
13 Observed 14:46:00 14:46:00 NO NO End
14 Lost 14:46:00 10:47:00 YES NO NO
15 Observed 10:47:00 10:47:00 NO Start NO
16 Observed 10:57:00 11:00:00 NO NO NO
17 Observed 11:10:00 11:10:00 NO NO NO
18 Observed 11:19:00 11:27:55 NO NO NO
19 Observed 11:28:05 11:32:00 NO NO NO
20 Observed 11:45:00 12:09:00 NO NO NO
21 Observed 11:51:00 11:51:00 NO NO NO
22 Observed 12:11:00 12:11:00 NO NO NO
23 Observed 13:15:00 13:15:00 NO NO End
24 Lost 13:15:00 7:53:00 YES NO NO
25 Observed 7:53:00 7:53:00 NO Start NO
26 Observed 8:48:00 8:48:00 NO NO NO
27 Observed 9:25:00 9:25:00 NO NO NO
28 Observed 9:26:00 9:26:00 NO NO NO
29 Observed 9:32:00 9:33:25 NO NO NO
30 Observed 9:33:35 9:33:35 NO NO NO
31 Observed 9:42:00 9:42:00 NO NO NO
32 Observed 9:44:00 9:44:00 NO NO NO
33 Observed 9:48:00 9:48:00 NO NO NO
34 Observed 9:48:30 9:48:30 NO NO NO
35 Observed 9:51:00 9:51:00 NO NO NO
36 Observed 9:54:00 9:54:00 NO NO NO
37 Observed 9:55:00 9:55:00 NO NO NO
38 Observed 9:57:00 10:01:00 NO NO NO
39 Observed 10:02:00 10:02:00 NO NO NO
40 Observed 10:04:00 10:04:00 NO NO NO
41 Observed 10:06:00 10:06:00 NO NO NO
42 Observed 10:20:00 10:33:00 NO NO NO
43 Observed 10:34:00 10:34:00 NO NO NO
44 Observed 10:39:00 10:39:00 NO NO End
Note: When there is a “Start” and an “End” in the same row it's because the non-lost period consists only of that record. 注意：如果同一行中同时存在“开始”和“结束”，这是因为非丢失时间段仅包含该记录。
I was able to identify the records that start or end these “non-lost” periods (under the columns “Starter” and “Ender”), but now I want to be able to identify those periods by giving them unique identifiers (period A,B,C or 1,2,3, etc). 我能够识别开始或结束这些“非丢失”期间的记录（在“启动器”和“结束器”列下），但是现在我希望能够通过给它们提供唯一的标识符来识别这些期间（时段A ，B，C或1,2,3等）。 Ideally, the name of the identifier would be the name of the start point for that period (ie, ID[ Starter==”Start”]) 理想情况下，标识符的名称应为该时间段的起点名称（即ID [Starter ==” Start”]）
I'm looking for something like this: 我正在寻找这样的东西：
ID Type TimeStart TimeEnd Limiter Starter Ender Period
1 Observed 6:45:00 6:45:00 NO Start End 1
2 Lost 6:45:00 5:31:00 YES NO NO Lost
3 Observed 5:31:00 5:31:00 NO Start NO 3
4 Observed 9:48:00 9:48:00 NO NO NO 3
5 Observed 10:02:00 10:02:00 NO NO NO 3
6 Observed 10:18:00 10:18:00 NO NO NO 3
7 Observed 11:00:00 11:00:00 NO NO NO 3
8 Observed 13:15:00 13:15:00 NO NO NO 3
9 Observed 13:34:00 13:34:00 NO NO NO 3
10 Observed 13:43:00 13:43:00 NO NO NO 3
11 Observed 13:52:00 13:52:00 NO NO NO 3
12 Observed 14:25:00 14:25:00 NO NO NO 3
13 Observed 14:46:00 14:46:00 NO NO End 3
14 Lost 14:46:00 10:47:00 YES NO NO Lost
15 Observed 10:47:00 10:47:00 NO Start NO 15
16 Observed 10:57:00 11:00:00 NO NO NO 15
17 Observed 11:10:00 11:10:00 NO NO NO 15
18 Observed 11:19:00 11:27:55 NO NO NO 15
19 Observed 11:28:05 11:32:00 NO NO NO 15
20 Observed 11:45:00 12:09:00 NO NO NO 15
21 Observed 11:51:00 11:51:00 NO NO NO 15
22 Observed 12:11:00 12:11:00 NO NO NO 15
23 Observed 13:15:00 13:15:00 NO NO End 15
24 Lost 13:15:00 7:53:00 YES NO NO Lost
Would this be too hard to do in R? 在R中这样做太难了吗？
Thanks! 谢谢！
1 个解决方案
解决方案1
0 已采纳 2013-05-02 17:31:04
> d <- data.frame(Limiter = rep("NO", 44), Starter = rep("NO", 44), Ender = rep("NO", 44), stringsAsFactors = FALSE)
> d$Starter[c(1, 3, 15, 25)] <- "Start"
> d$Ender[c(1, 13, 23, 44)] <- "End"
> d$Limiter[c(2, 14, 24)] <- "Yes"
> d$Period <- ifelse(d$Limiter == "Yes", "Lost", which(d$Starter == "Start")[cumsum(d$Starter == "Start")])
> d
Limiter Starter Ender Period
1 NO Start End 1
2 Yes NO NO Lost
3 NO Start NO 3
4 NO NO NO 3
5 NO NO NO 3
6 NO NO NO 3
7 NO NO NO 3
8 NO NO NO 3
9 NO NO NO 3
10 NO NO NO 3
11 NO NO NO 3
12 NO NO NO 3
13 NO NO End 3
14 Yes NO NO Lost
15 NO Start NO 15
16 NO NO NO 15
17 NO NO NO 15
18 NO NO NO 15
19 NO NO NO 15
20 NO NO NO 15
21 NO NO NO 15
22 NO NO NO 15
23 NO NO End 15
24 Yes NO NO Lost
25 NO Start NO 25
26 NO NO NO 25
27 NO NO NO 25
28 NO NO NO 25
29 NO NO NO 25
30 NO NO NO 25
31 NO NO NO 25
32 NO NO NO 25
33 NO NO NO 25
34 NO NO NO 25
35 NO NO NO 25
36 NO NO NO 25
37 NO NO NO 25
38 NO NO NO 25
39 NO NO NO 25
40 NO NO NO 25
41 NO NO NO 25
42 NO NO NO 25
43 NO NO NO 25
44 NO NO End 25
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