在 R 中查找两个日期之间的月数

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月数。

例子：

Input: Date_1 = 2020/02/21

  Date_2 = 2020/03/21

Output: 1

Explanation: In Date_1 and Date_2 have only one difference in month.

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。它将值之间的长度和差异作为可选参数。

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

Where: seq is function generates a sequence of numbers, from is starting date, to is ending date.

示例 1：在下面的示例中，我们将两个日期存储在两个不同的变量中，并通过使用 length(seq(from=date_1, to=date_2, by='month')) 我们找到这两个日期之间的月份数.

R

# creating date_1 variable and storing date in it.
date_1<-as.Date("2020-08-10")
 
# creating date_2 variable and storing date in it.
date_2<-as.Date("2020-10-10")
 
# Here first date will  start from 2020-08-10 and
# end by 2020-10-10.Here increment is done by month.
# This three dates  will be generated as we used
# seq and this dates will be stored in a. 
a = seq(from = date_1, to = date_2, by = 'month'))
 
# Here we are finding length of a and we are subtracting
# 1 because we dont need to include current month.
length(a)-1

输出：

2

示例 2：检查不同的日期。

电阻

# creating date_1 variable and storing date in it.
date_1<-as.Date("2020-01-23")
 
# creating date_2 variable and storing date in it.
date_2<-as.Date("2020-9-25")
 
# Here first date will  start from 2020-01-23
# and end by 2020-9-25.Here increment is done
# by month.This three dates  will be generated
# as we used seq and this dates will be stored in a. 
a=seq(from = date_1, to = date_2, by = 'month'))
 
# Here we are finding length of a and we are
# subtracting 1 because we dont need to include
# current month.
length(a)-1

输出：

8