R:连续计数 [英] R: counting consecutive days
本文介绍了R:连续计数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我无法解决此问题，我有一个带有计数数据列表的DF.例如这样的东西:
I am having trouble solving this one, I have a DF with a list of count data. For example something like this:
DATE TIME ID
2014-02-14 15:02 1
2014-02-15 15:12 1
2014-02-16 08:34 2
2014-02-17 02:02 2
2014-02-19 11:02 1
2014-02-20 15:42 1
2014-02-22 16:02 2
2014-02-25 15.02 1
....
现在，我想创建一个函数来测量连续几天的长度，但是我希望该函数能够设置允许日期分开的天数(默认值= 1天).输出应为DF，每个ID包含多行(因为这些行表示存在多个活动时间段)，并且每个连续时间段应显示该时间段所包含的天数.输出示例应为:
Now I want to make a function that measures the length of a consecutive period of days, but I want the function to have the ability to set a number of days that the dates are allowed to be apart (default = 1 day). The output should be a DF which has multiple rows per ID (as these represent that there are multiple periods of activity) and per consecutive periods should display the amount of days that period consisted of. Example of the output should be:
ID periodID days
1 1 2
2 1 2
1 2 2
....
第一个问题是，如何构造这样的DF?其次，如何扩展此范围，以便可以在函数中输入确保日期为例如同一时间段中包含相隔2或4天的日期(因此不包含连续的日期，但是日期之间可以相隔> 1天)?
So the first question is, how can I construct a DF like this? Secondly, how can I extend this so that I can have an input in the function that makes sure dates that are e.g. 2 or 4 days apart are included in the same period (so not consecutive dates, but the dates are allowed to be >1 day apart)?
编辑:这是我正在处理的原始数据集的摘要(请注意，同一天有多个数据点，但是时间被忽略，只有日期才重要).
EDIT Here is a snippet of the original dataset I am working on (note that there are multiple data points on the same day, but time is ignored, only the date matters).
date time ID
24-10-14 10:47:36 1
24-10-14 10:52:19 1
24-10-14 10:56:47 1
24-10-14 10:58:57 1
24-10-14 11:39:18 1
24-10-14 12:03:27 1
24-10-14 12:19:22 1
24-10-14 12:43:22 2
24-10-14 12:44:42 2
24-10-14 12:55:47 1
24-10-14 12:58:15 3
24-10-14 14:12:35 1
24-10-14 14:29:20 1
24-10-14 14:42:27 1
24-10-14 14:43:49 1
24-10-14 15:49:46 1
24-10-14 16:03:21 1
24-10-14 16:08:09 1
24-10-14 17:24:34 1
24-10-14 17:25:46 1
24-10-14 17:34:06 1
24-10-14 17:35:26 1
24-10-14 17:45:54 1
24-10-14 17:55:03 1
24-10-14 17:57:37 1
24-10-14 18:01:27 1
24-10-14 18:02:46 1
24-10-14 18:07:02 1
24-10-14 18:08:17 1
24-10-14 18:09:51 1
24-10-14 18:15:04 1
24-10-14 18:16:50 1
24-10-14 18:18:28 1
24-10-14 18:23:14 1
24-10-14 18:33:17 1
24-10-14 18:34:18 1
24-10-14 18:40:06 1
24-10-14 18:41:21 1
25-10-14 03:54:16 4
25-10-14 03:57:18 4
25-10-14 03:58:48 4
25-10-14 04:05:54 4
25-10-14 04:07:30 4
25-10-14 04:08:47 4
25-10-14 04:21:46 4
25-10-14 04:26:59 4
25-10-14 07:33:44 2
25-10-14 07:35:00 2
25-10-14 07:45:23 2
25-10-14 07:56:48 2
25-10-14 08:01:38 2
25-10-14 08:07:05 2
25-10-14 08:08:23 2
25-10-14 08:11:29 2
25-10-14 08:13:23 2
25-10-14 08:15:15 2
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25-10-14 08:24:53 2
25-10-14 08:32:34 2
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推荐答案
我们可以使用 dplyr .首先，将您的数据转换为正确的日期格式:
We can use dplyr. First, convert your data in proper date format:
z$date <- as.Date(as.character(z$date), format = "%d-%m-%y")
现在功能:
library(dplyr)
runchecker <- function(data, days){
data %>% arrange(date) %>%
group_by(ID) %>%
mutate(diff = c(0, diff(date)),
periodID = 1 + cumsum(diff > days)) %>%
group_by(ID, periodID) %>%
summarise(days = last(date) - first(date))
}
并在您的数据上调用它:
and call it on your data:
runchecker(data, 1)
Source: local data frame [4 x 3]
Groups: ID [?]
ID periodID days
(int) (dbl) (dfft)
1 1 1 0 days
2 2 1 3 days
3 3 1 0 days
4 4 1 0 days
请注意，您的数据几乎没有日期更改或间隔，也许包括更好的测试数据集?
NB your data has very few date changes or gaps, maybe include a better data set for testing?
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