如何获取 12 小时制中两个日期时间行之间的时差
how to get the time difference between two datetime rows that are in 12 hour system
我正在尝试获取数据框中的时差,该数据框在不同的列上具有日期和时间。我首先结合日期和时间列开始,我已经能够得到差异,但由于时间是 12 小时系统,我不断得到负值。
我对R不是很精通,也不知道哪里错了。
我正在添加我使用的代码以及我的数据样例。
library(readxl)
library(dplyr)
library(openxlsx)
library(tidyverse)
library(lubridate)
sampledata<-"Date Time
10/1/2001 4.00
10/1/2001 4.15
10/1/2001 4.30
10/1/2001 4.45
10/1/2001 5.00
10/1/2001 5.15
10/1/2001 5.30
10/1/2001 5.45
10/1/2001 6.00
10/1/2001 6.15
10/1/2001 6.30
10/2/2001 6.45
10/2/2001 7.00
10/2/2001 7.15
10/2/2001 7.30
10/2/2001 7.45
10/2/2001 8.00
10/2/2001 8.15
10/2/2001 8.30
10/2/2001 8.45
10/2/2001 9.00
10/2/2001 9.15
10/2/2001 9.30
10/2/2001 9.45
10/2/2001 10.00
10/2/2001 10.15
10/2/2001 10.30
10/2/2001 10.45
10/2/2001 11.00
10/2/2001 11.15
10/2/2001 11.30
10/2/2001 11.45
10/2/2001 12.00
10/2/2001 12.15
10/2/2001 12.30
10/2/2001 12.45
10/2/2001 1.00
10/2/2001 1.15
10/2/2001 1.30
10/2/2001 1.45
10/2/2001 2.00
10/2/2001 2.15
10/2/2001 2.30
10/2/2001 2.45
10/2/2001 3.00
10/2/2001 3.15
10/2/2001 3.30
10/2/2001 4.00
10/2/2001 4.15
10/2/2001 4.30
10/2/2001 4.45
10/2/2001 5.00
10/2/2001 5.15
10/2/2001 5.30
10/2/2001 5.45
10/2/2001 6.00
10/3/2001 6.15
10/3/2001 6.30
10/3/2001 6.45
10/3/2001 7.00
10/3/2001 7.15
10/3/2001 7.30
10/3/2001 7.45
10/3/2001 8.00
10/3/2001 8.15
10/3/2001 8.30
10/3/2001 8.45
10/3/2001 9.00
10/3/2001 9.15
10/3/2001 9.30
10/3/2001 9.45
10/3/2001 10.00
10/3/2001 10.15
10/3/2001 10.30
10/3/2001 10.45
10/3/2001 11.00
10/3/2001 11.15
10/3/2001 11.30
10/3/2001 11.45
10/3/2001 12.00
10/3/2001 12.15
10/3/2001 12.30
10/3/2001 12.45
10/3/2001 1.00
10/3/2001 1.15
10/3/2001 1.30
10/3/2001 1.45
10/3/2001 2.00
10/3/2001 2.15
10/3/2001 2.30
10/3/2001 2.45
10/3/2001 3.00
10/3/2001 3.15
10/3/2001 3.30
10/3/2001 3.45
10/3/2001 4.00
10/3/2001 4.15
10/3/2001 4.30
10/3/2001 4.45
10/3/2001 5.00
10/3/2001 5.15
10/3/2001 5.30
10/3/2001 5.45
10/3/2001 6.00"
#read data
usedata <- read.table(text=sampledata, header = TRUE)
#Combining Date and Time columns
usedata$datetime<-with(usedata, mdy(usedata$Date) + hm(usedata$Time))
#Converting datetime to date and time variables
usedata$datetime<-as.POSIXct(usedata$datetime,format="%Y-%m-%d%H:%M:%S")
#Calculating time difference between each time interval
df<-usedata %>%
group_by(Date)%>%
mutate(Time_Duration = (difftime(datetime, lag(datetime, default = datetime[1]), unit='secs')))
df
df$Time_Duration
当时间从中午12点变为下午1点时,df$Time_Duration给出的时间差为负数。我假设这是一个问题,因为我的时间是在 12 小时制中,但也许是其他原因。
我尝试使用 strptime 和格式将日期时间列转换为 24 小时,然后才发现差异,但我得到日期时间列的 NA 值。
我尝试了以下 strptime 代码来转换为 24 小时
x <- strptime(usedata$datetime, format="%Y-%m-%d %I:%M:%S %p")
x
format(x, "%Y-%m-%d %H:%M:%S")
我将不胜感激任何能得到的帮助。谢谢
我认为应该这样做。重点是将时间列中的小数转换为固定小数位数的字符串,将日期和时间列粘贴在一起,并在strptime
中使用正确的format
。如果在特定日期内连续时间之间的差异为负数,您知道可以将 12 小时和当天的所有后续时间相加。
library(lubridate)
library(dplyr)
sampledata %>%
mutate(Datetime = as.POSIXct(strptime(paste(Date, format(Time, nsmall = 2)),
format = "%m/%d/%Y %H.%M"))) %>%
group_by(Date) %>%
mutate(diff_t = cumsum(as.numeric(c(0, as.numeric(diff(Datetime))) < 0))) %>%
ungroup() %>%
mutate(Datetime = as.POSIXct(ifelse(diff_t == 1, Datetime + hours(12), Datetime),
origin = "1970-01-01")) %>%
select(-diff_t) %>%
as.data.frame()
产生以下结果:
#> Date Time Datetime
#> 1 10/1/2001 4.00 2001-10-01 04:00:00
#> 2 10/1/2001 4.15 2001-10-01 04:15:00
#> 3 10/1/2001 4.30 2001-10-01 04:30:00
#> 4 10/1/2001 4.45 2001-10-01 04:45:00
#> 5 10/1/2001 5.00 2001-10-01 05:00:00
#> 6 10/1/2001 5.15 2001-10-01 05:15:00
#> 7 10/1/2001 5.30 2001-10-01 05:30:00
#> 8 10/1/2001 5.45 2001-10-01 05:45:00
#> 9 10/1/2001 6.00 2001-10-01 06:00:00
#> 10 10/1/2001 6.15 2001-10-01 06:15:00
#> 11 10/1/2001 6.30 2001-10-01 06:30:00
#> 12 10/2/2001 6.45 2001-10-02 06:45:00
#> 13 10/2/2001 7.00 2001-10-02 07:00:00
#> 14 10/2/2001 7.15 2001-10-02 07:15:00
#> 15 10/2/2001 7.30 2001-10-02 07:30:00
#> 16 10/2/2001 7.45 2001-10-02 07:45:00
#> 17 10/2/2001 8.00 2001-10-02 08:00:00
#> 18 10/2/2001 8.15 2001-10-02 08:15:00
#> 19 10/2/2001 8.30 2001-10-02 08:30:00
#> 20 10/2/2001 8.45 2001-10-02 08:45:00
#> 21 10/2/2001 9.00 2001-10-02 09:00:00
#> 22 10/2/2001 9.15 2001-10-02 09:15:00
#> 23 10/2/2001 9.30 2001-10-02 09:30:00
#> 24 10/2/2001 9.45 2001-10-02 09:45:00
#> 25 10/2/2001 10.00 2001-10-02 10:00:00
#> 26 10/2/2001 10.15 2001-10-02 10:15:00
#> 27 10/2/2001 10.30 2001-10-02 10:30:00
#> 28 10/2/2001 10.45 2001-10-02 10:45:00
#> 29 10/2/2001 11.00 2001-10-02 11:00:00
#> 30 10/2/2001 11.15 2001-10-02 11:15:00
#> 31 10/2/2001 11.30 2001-10-02 11:30:00
#> 32 10/2/2001 11.45 2001-10-02 11:45:00
#> 33 10/2/2001 12.00 2001-10-02 12:00:00
#> 34 10/2/2001 12.15 2001-10-02 12:15:00
#> 35 10/2/2001 12.30 2001-10-02 12:30:00
#> 36 10/2/2001 12.45 2001-10-02 12:45:00
#> 37 10/2/2001 1.00 2001-10-02 13:00:00
#> 38 10/2/2001 1.15 2001-10-02 13:15:00
#> 39 10/2/2001 1.30 2001-10-02 13:30:00
#> 40 10/2/2001 1.45 2001-10-02 13:45:00
#> 41 10/2/2001 2.00 2001-10-02 14:00:00
#> 42 10/2/2001 2.15 2001-10-02 14:15:00
#> 43 10/2/2001 2.30 2001-10-02 14:30:00
#> 44 10/2/2001 2.45 2001-10-02 14:45:00
#> 45 10/2/2001 3.00 2001-10-02 15:00:00
#> 46 10/2/2001 3.15 2001-10-02 15:15:00
#> 47 10/2/2001 3.30 2001-10-02 15:30:00
#> 48 10/2/2001 4.00 2001-10-02 16:00:00
#> 49 10/2/2001 4.15 2001-10-02 16:15:00
#> 50 10/2/2001 4.30 2001-10-02 16:30:00
#> 51 10/2/2001 4.45 2001-10-02 16:45:00
#> 52 10/2/2001 5.00 2001-10-02 17:00:00
#> 53 10/2/2001 5.15 2001-10-02 17:15:00
#> 54 10/2/2001 5.30 2001-10-02 17:30:00
#> 55 10/2/2001 5.45 2001-10-02 17:45:00
#> 56 10/2/2001 6.00 2001-10-02 18:00:00
#> 57 10/3/2001 6.15 2001-10-03 06:15:00
#> 58 10/3/2001 6.30 2001-10-03 06:30:00
#> 59 10/3/2001 6.45 2001-10-03 06:45:00
#> 60 10/3/2001 7.00 2001-10-03 07:00:00
#> 61 10/3/2001 7.15 2001-10-03 07:15:00
#> 62 10/3/2001 7.30 2001-10-03 07:30:00
#> 63 10/3/2001 7.45 2001-10-03 07:45:00
#> 64 10/3/2001 8.00 2001-10-03 08:00:00
#> 65 10/3/2001 8.15 2001-10-03 08:15:00
#> 66 10/3/2001 8.30 2001-10-03 08:30:00
#> 67 10/3/2001 8.45 2001-10-03 08:45:00
#> 68 10/3/2001 9.00 2001-10-03 09:00:00
#> 69 10/3/2001 9.15 2001-10-03 09:15:00
#> 70 10/3/2001 9.30 2001-10-03 09:30:00
#> 71 10/3/2001 9.45 2001-10-03 09:45:00
#> 72 10/3/2001 10.00 2001-10-03 10:00:00
#> 73 10/3/2001 10.15 2001-10-03 10:15:00
#> 74 10/3/2001 10.30 2001-10-03 10:30:00
#> 75 10/3/2001 10.45 2001-10-03 10:45:00
#> 76 10/3/2001 11.00 2001-10-03 11:00:00
#> 77 10/3/2001 11.15 2001-10-03 11:15:00
#> 78 10/3/2001 11.30 2001-10-03 11:30:00
#> 79 10/3/2001 11.45 2001-10-03 11:45:00
#> 80 10/3/2001 12.00 2001-10-03 12:00:00
#> 81 10/3/2001 12.15 2001-10-03 12:15:00
#> 82 10/3/2001 12.30 2001-10-03 12:30:00
#> 83 10/3/2001 12.45 2001-10-03 12:45:00
#> 84 10/3/2001 1.00 2001-10-03 13:00:00
#> 85 10/3/2001 1.15 2001-10-03 13:15:00
#> 86 10/3/2001 1.30 2001-10-03 13:30:00
#> 87 10/3/2001 1.45 2001-10-03 13:45:00
#> 88 10/3/2001 2.00 2001-10-03 14:00:00
#> 89 10/3/2001 2.15 2001-10-03 14:15:00
#> 90 10/3/2001 2.30 2001-10-03 14:30:00
#> 91 10/3/2001 2.45 2001-10-03 14:45:00
#> 92 10/3/2001 3.00 2001-10-03 15:00:00
#> 93 10/3/2001 3.15 2001-10-03 15:15:00
#> 94 10/3/2001 3.30 2001-10-03 15:30:00
#> 95 10/3/2001 3.45 2001-10-03 15:45:00
#> 96 10/3/2001 4.00 2001-10-03 16:00:00
#> 97 10/3/2001 4.15 2001-10-03 16:15:00
#> 98 10/3/2001 4.30 2001-10-03 16:30:00
#> 99 10/3/2001 4.45 2001-10-03 16:45:00
#> 100 10/3/2001 5.00 2001-10-03 17:00:00
#> 101 10/3/2001 5.15 2001-10-03 17:15:00
#> 102 10/3/2001 5.30 2001-10-03 17:30:00
#> 103 10/3/2001 5.45 2001-10-03 17:45:00
#> 104 10/3/2001 6.00 2001-10-03 18:00:00
由 reprex package (v0.3.0)
于 2020-07-21 创建
我正在尝试获取数据框中的时差,该数据框在不同的列上具有日期和时间。我首先结合日期和时间列开始,我已经能够得到差异,但由于时间是 12 小时系统,我不断得到负值。 我对R不是很精通,也不知道哪里错了。
我正在添加我使用的代码以及我的数据样例。
library(readxl)
library(dplyr)
library(openxlsx)
library(tidyverse)
library(lubridate)
sampledata<-"Date Time
10/1/2001 4.00
10/1/2001 4.15
10/1/2001 4.30
10/1/2001 4.45
10/1/2001 5.00
10/1/2001 5.15
10/1/2001 5.30
10/1/2001 5.45
10/1/2001 6.00
10/1/2001 6.15
10/1/2001 6.30
10/2/2001 6.45
10/2/2001 7.00
10/2/2001 7.15
10/2/2001 7.30
10/2/2001 7.45
10/2/2001 8.00
10/2/2001 8.15
10/2/2001 8.30
10/2/2001 8.45
10/2/2001 9.00
10/2/2001 9.15
10/2/2001 9.30
10/2/2001 9.45
10/2/2001 10.00
10/2/2001 10.15
10/2/2001 10.30
10/2/2001 10.45
10/2/2001 11.00
10/2/2001 11.15
10/2/2001 11.30
10/2/2001 11.45
10/2/2001 12.00
10/2/2001 12.15
10/2/2001 12.30
10/2/2001 12.45
10/2/2001 1.00
10/2/2001 1.15
10/2/2001 1.30
10/2/2001 1.45
10/2/2001 2.00
10/2/2001 2.15
10/2/2001 2.30
10/2/2001 2.45
10/2/2001 3.00
10/2/2001 3.15
10/2/2001 3.30
10/2/2001 4.00
10/2/2001 4.15
10/2/2001 4.30
10/2/2001 4.45
10/2/2001 5.00
10/2/2001 5.15
10/2/2001 5.30
10/2/2001 5.45
10/2/2001 6.00
10/3/2001 6.15
10/3/2001 6.30
10/3/2001 6.45
10/3/2001 7.00
10/3/2001 7.15
10/3/2001 7.30
10/3/2001 7.45
10/3/2001 8.00
10/3/2001 8.15
10/3/2001 8.30
10/3/2001 8.45
10/3/2001 9.00
10/3/2001 9.15
10/3/2001 9.30
10/3/2001 9.45
10/3/2001 10.00
10/3/2001 10.15
10/3/2001 10.30
10/3/2001 10.45
10/3/2001 11.00
10/3/2001 11.15
10/3/2001 11.30
10/3/2001 11.45
10/3/2001 12.00
10/3/2001 12.15
10/3/2001 12.30
10/3/2001 12.45
10/3/2001 1.00
10/3/2001 1.15
10/3/2001 1.30
10/3/2001 1.45
10/3/2001 2.00
10/3/2001 2.15
10/3/2001 2.30
10/3/2001 2.45
10/3/2001 3.00
10/3/2001 3.15
10/3/2001 3.30
10/3/2001 3.45
10/3/2001 4.00
10/3/2001 4.15
10/3/2001 4.30
10/3/2001 4.45
10/3/2001 5.00
10/3/2001 5.15
10/3/2001 5.30
10/3/2001 5.45
10/3/2001 6.00"
#read data
usedata <- read.table(text=sampledata, header = TRUE)
#Combining Date and Time columns
usedata$datetime<-with(usedata, mdy(usedata$Date) + hm(usedata$Time))
#Converting datetime to date and time variables
usedata$datetime<-as.POSIXct(usedata$datetime,format="%Y-%m-%d%H:%M:%S")
#Calculating time difference between each time interval
df<-usedata %>%
group_by(Date)%>%
mutate(Time_Duration = (difftime(datetime, lag(datetime, default = datetime[1]), unit='secs')))
df
df$Time_Duration
当时间从中午12点变为下午1点时,df$Time_Duration给出的时间差为负数。我假设这是一个问题,因为我的时间是在 12 小时制中,但也许是其他原因。 我尝试使用 strptime 和格式将日期时间列转换为 24 小时,然后才发现差异,但我得到日期时间列的 NA 值。
我尝试了以下 strptime 代码来转换为 24 小时
x <- strptime(usedata$datetime, format="%Y-%m-%d %I:%M:%S %p")
x
format(x, "%Y-%m-%d %H:%M:%S")
我将不胜感激任何能得到的帮助。谢谢
我认为应该这样做。重点是将时间列中的小数转换为固定小数位数的字符串,将日期和时间列粘贴在一起,并在strptime
中使用正确的format
。如果在特定日期内连续时间之间的差异为负数,您知道可以将 12 小时和当天的所有后续时间相加。
library(lubridate)
library(dplyr)
sampledata %>%
mutate(Datetime = as.POSIXct(strptime(paste(Date, format(Time, nsmall = 2)),
format = "%m/%d/%Y %H.%M"))) %>%
group_by(Date) %>%
mutate(diff_t = cumsum(as.numeric(c(0, as.numeric(diff(Datetime))) < 0))) %>%
ungroup() %>%
mutate(Datetime = as.POSIXct(ifelse(diff_t == 1, Datetime + hours(12), Datetime),
origin = "1970-01-01")) %>%
select(-diff_t) %>%
as.data.frame()
产生以下结果:
#> Date Time Datetime
#> 1 10/1/2001 4.00 2001-10-01 04:00:00
#> 2 10/1/2001 4.15 2001-10-01 04:15:00
#> 3 10/1/2001 4.30 2001-10-01 04:30:00
#> 4 10/1/2001 4.45 2001-10-01 04:45:00
#> 5 10/1/2001 5.00 2001-10-01 05:00:00
#> 6 10/1/2001 5.15 2001-10-01 05:15:00
#> 7 10/1/2001 5.30 2001-10-01 05:30:00
#> 8 10/1/2001 5.45 2001-10-01 05:45:00
#> 9 10/1/2001 6.00 2001-10-01 06:00:00
#> 10 10/1/2001 6.15 2001-10-01 06:15:00
#> 11 10/1/2001 6.30 2001-10-01 06:30:00
#> 12 10/2/2001 6.45 2001-10-02 06:45:00
#> 13 10/2/2001 7.00 2001-10-02 07:00:00
#> 14 10/2/2001 7.15 2001-10-02 07:15:00
#> 15 10/2/2001 7.30 2001-10-02 07:30:00
#> 16 10/2/2001 7.45 2001-10-02 07:45:00
#> 17 10/2/2001 8.00 2001-10-02 08:00:00
#> 18 10/2/2001 8.15 2001-10-02 08:15:00
#> 19 10/2/2001 8.30 2001-10-02 08:30:00
#> 20 10/2/2001 8.45 2001-10-02 08:45:00
#> 21 10/2/2001 9.00 2001-10-02 09:00:00
#> 22 10/2/2001 9.15 2001-10-02 09:15:00
#> 23 10/2/2001 9.30 2001-10-02 09:30:00
#> 24 10/2/2001 9.45 2001-10-02 09:45:00
#> 25 10/2/2001 10.00 2001-10-02 10:00:00
#> 26 10/2/2001 10.15 2001-10-02 10:15:00
#> 27 10/2/2001 10.30 2001-10-02 10:30:00
#> 28 10/2/2001 10.45 2001-10-02 10:45:00
#> 29 10/2/2001 11.00 2001-10-02 11:00:00
#> 30 10/2/2001 11.15 2001-10-02 11:15:00
#> 31 10/2/2001 11.30 2001-10-02 11:30:00
#> 32 10/2/2001 11.45 2001-10-02 11:45:00
#> 33 10/2/2001 12.00 2001-10-02 12:00:00
#> 34 10/2/2001 12.15 2001-10-02 12:15:00
#> 35 10/2/2001 12.30 2001-10-02 12:30:00
#> 36 10/2/2001 12.45 2001-10-02 12:45:00
#> 37 10/2/2001 1.00 2001-10-02 13:00:00
#> 38 10/2/2001 1.15 2001-10-02 13:15:00
#> 39 10/2/2001 1.30 2001-10-02 13:30:00
#> 40 10/2/2001 1.45 2001-10-02 13:45:00
#> 41 10/2/2001 2.00 2001-10-02 14:00:00
#> 42 10/2/2001 2.15 2001-10-02 14:15:00
#> 43 10/2/2001 2.30 2001-10-02 14:30:00
#> 44 10/2/2001 2.45 2001-10-02 14:45:00
#> 45 10/2/2001 3.00 2001-10-02 15:00:00
#> 46 10/2/2001 3.15 2001-10-02 15:15:00
#> 47 10/2/2001 3.30 2001-10-02 15:30:00
#> 48 10/2/2001 4.00 2001-10-02 16:00:00
#> 49 10/2/2001 4.15 2001-10-02 16:15:00
#> 50 10/2/2001 4.30 2001-10-02 16:30:00
#> 51 10/2/2001 4.45 2001-10-02 16:45:00
#> 52 10/2/2001 5.00 2001-10-02 17:00:00
#> 53 10/2/2001 5.15 2001-10-02 17:15:00
#> 54 10/2/2001 5.30 2001-10-02 17:30:00
#> 55 10/2/2001 5.45 2001-10-02 17:45:00
#> 56 10/2/2001 6.00 2001-10-02 18:00:00
#> 57 10/3/2001 6.15 2001-10-03 06:15:00
#> 58 10/3/2001 6.30 2001-10-03 06:30:00
#> 59 10/3/2001 6.45 2001-10-03 06:45:00
#> 60 10/3/2001 7.00 2001-10-03 07:00:00
#> 61 10/3/2001 7.15 2001-10-03 07:15:00
#> 62 10/3/2001 7.30 2001-10-03 07:30:00
#> 63 10/3/2001 7.45 2001-10-03 07:45:00
#> 64 10/3/2001 8.00 2001-10-03 08:00:00
#> 65 10/3/2001 8.15 2001-10-03 08:15:00
#> 66 10/3/2001 8.30 2001-10-03 08:30:00
#> 67 10/3/2001 8.45 2001-10-03 08:45:00
#> 68 10/3/2001 9.00 2001-10-03 09:00:00
#> 69 10/3/2001 9.15 2001-10-03 09:15:00
#> 70 10/3/2001 9.30 2001-10-03 09:30:00
#> 71 10/3/2001 9.45 2001-10-03 09:45:00
#> 72 10/3/2001 10.00 2001-10-03 10:00:00
#> 73 10/3/2001 10.15 2001-10-03 10:15:00
#> 74 10/3/2001 10.30 2001-10-03 10:30:00
#> 75 10/3/2001 10.45 2001-10-03 10:45:00
#> 76 10/3/2001 11.00 2001-10-03 11:00:00
#> 77 10/3/2001 11.15 2001-10-03 11:15:00
#> 78 10/3/2001 11.30 2001-10-03 11:30:00
#> 79 10/3/2001 11.45 2001-10-03 11:45:00
#> 80 10/3/2001 12.00 2001-10-03 12:00:00
#> 81 10/3/2001 12.15 2001-10-03 12:15:00
#> 82 10/3/2001 12.30 2001-10-03 12:30:00
#> 83 10/3/2001 12.45 2001-10-03 12:45:00
#> 84 10/3/2001 1.00 2001-10-03 13:00:00
#> 85 10/3/2001 1.15 2001-10-03 13:15:00
#> 86 10/3/2001 1.30 2001-10-03 13:30:00
#> 87 10/3/2001 1.45 2001-10-03 13:45:00
#> 88 10/3/2001 2.00 2001-10-03 14:00:00
#> 89 10/3/2001 2.15 2001-10-03 14:15:00
#> 90 10/3/2001 2.30 2001-10-03 14:30:00
#> 91 10/3/2001 2.45 2001-10-03 14:45:00
#> 92 10/3/2001 3.00 2001-10-03 15:00:00
#> 93 10/3/2001 3.15 2001-10-03 15:15:00
#> 94 10/3/2001 3.30 2001-10-03 15:30:00
#> 95 10/3/2001 3.45 2001-10-03 15:45:00
#> 96 10/3/2001 4.00 2001-10-03 16:00:00
#> 97 10/3/2001 4.15 2001-10-03 16:15:00
#> 98 10/3/2001 4.30 2001-10-03 16:30:00
#> 99 10/3/2001 4.45 2001-10-03 16:45:00
#> 100 10/3/2001 5.00 2001-10-03 17:00:00
#> 101 10/3/2001 5.15 2001-10-03 17:15:00
#> 102 10/3/2001 5.30 2001-10-03 17:30:00
#> 103 10/3/2001 5.45 2001-10-03 17:45:00
#> 104 10/3/2001 6.00 2001-10-03 18:00:00
由 reprex package (v0.3.0)
于 2020-07-21 创建