将随机观察值的总和计算为 R 中的每周总和

Question

我有一个随机的、有时不频繁的事件数据集，我想将其计为每周总和。由于随机性，它们不是线性的，所以我到目前为止尝试过的其他示例不适用。

数据类似这样：


df_date <- data.frame( Name = c("Jim","Jim","Jim","Jim","Jim","Jim","Jim","Jim","Jim","Jim",
                                "Sue","Sue","Sue","Sue","Sue","Sue","Sue","Sue","Sue","Sue"),
                       Dates = c("2010-1-1", "2010-1-2", "2010-01-5","2010-01-17","2010-01-20",
                                 "2010-01-29","2010-02-6","2010-02-9","2010-02-16","2010-02-28",
                                 "2010-1-1", "2010-1-2", "2010-01-5","2010-01-17","2010-01-20",
                                 "2010-01-29","2010-02-6","2010-02-9","2010-02-16","2010-02-28"),
                       Event = c(1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1) )

我想做的是创建一个新的 table，其中包含日历年中每周的事件总和。

在这种情况下产生这样的东西：

Name   Week   Events
Jim    1      3
Sue    1      3
Jim    2      0
Sue    x ...  x 

and so on...

Answer 1

多年更新OP请求：

我们也可以使用 lubridate 中的 isoweek 而不是 week

或：

我们可以按如下方式添加年份：

df_date %>% 
  as_tibble() %>% 
  mutate(Week = week(ymd(Dates))) %>% 
  mutate(Year = year(ymd(Dates))) %>% 
  count(Name, Year, Week)

我们可以在使用lubridates ymd函数将字符Dates转换为日期格式后使用lubridates Week函数。然后我们可以使用 count 这是 group_by(Name, Week) %>% summarise(Count = n()) 的缩写 :

library(dplyr)
library(lubridate)
df_date %>% 
  as_tibble() %>% 
  mutate(Week = week(ymd(Dates))) %>% 
  count(Name, Week)

  Name   Week     n
   <chr> <dbl> <int>
 1 Jim       1     3
 2 Jim       3     2
 3 Jim       5     1
 4 Jim       6     2
 5 Jim       7     1
 6 Jim       9     1
 7 Sue       1     3
 8 Sue       3     2
 9 Sue       5     1
10 Sue       6     2
11 Sue       7     1
12 Sue       9     1

Answer 2

这是一种方法，可以让您获得每个人的每个 ISO 周，当该周没有针对该人的事件时为零：

get_dates_df <- function(d) {
  data.frame(date = seq(min(d, na.rm=T),max(d,na.rm=T),1)) %>% 
    mutate(Year=year(date), Week=week(date)) %>% 
    distinct(Year, Week)    
}

df_date = df_date %>% mutate(Dates=lubridate::ymd(Dates))

left_join(
  full_join(distinct(df_date %>% select(Name)), get_dates_df(df_date$Dates), by=character()),
  df_date %>% 
  group_by(Name,Year=year(Dates), Week=week(Dates)) %>% 
  summarize(Events = sum(Event), .groups="drop")
) %>% 
  mutate(Events=if_else(is.na(Events),0,Events))

输出：

   Name Year Week Events
1   Jim 2010    1      3
2   Jim 2010    2      0
3   Jim 2010    3      2
4   Jim 2010    4      0
5   Jim 2010    5      1
6   Jim 2010    6      2
7   Jim 2010    7      1
8   Jim 2010    8      0
9   Jim 2010    9      1
10  Sue 2010    1      3
11  Sue 2010    2      0
12  Sue 2010    3      2
13  Sue 2010    4      0
14  Sue 2010    5      1
15  Sue 2010    6      2
16  Sue 2010    7      1
17  Sue 2010    8      0
18  Sue 2010    9      1

将随机观察值的总和计算为 R 中的每周总和

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