如何计算R中两个日期之间的天数？

在本文中，我们将讨论如何在 R 编程语言中查找两个日期之间的天数。

例子：

Input:

 Date_1 = 2020/03/21

 Date_2 = 2020/03/22

Output: 1

Explanation: In Date_1 and Date_2 have only one difference in day.So output will be 1.

这里我们将使用 seq()函数来获取结果。此函数用于在 Vector 中创建元素序列。要获得天数，length()函数与 seq() 作为参数一起使用。

Syntax: length(seq(from=date_1, to=date_2, by=’day’)) -1

Parameter:

• seq is function generates a sequence of numbers.
• from is starting date.
• to is ending date.
• by is step, increment.

示例 1：

R

# creating date_1 variable
# and storing date in it.
date_1<-as.Date("2020-10-10")
 
# creating date_2 variable
# and storing date in it.
date_2<-as.Date("2020-10-11")
.
a = seq(from = date_1, to = date_2, by = 'day')
 
# Here we are finding length of
# a and we are subtracting 1 because
# we dont need to include current day.
length(a)-1

输出：

1

示例 2：

电阻

# creating date_1 variable
# and storing date in it.
date_1<-as.Date("2020-01-10")
 
# creating date_2 variable
# and storing date in it.
date_2<-as.Date("2020-02-20")
 
a = seq(from = date_1, to = date_2, by = 'day')
 
# Here we are finding length of a
# and we are subtracting 1 because we
# dont need to include current day.
length(a)-1

输出：

41