R 编程中数据集的重新排序——arrange()函数

R语言中的arrange()函数用于借助列名作为传递给函数的表达式对表行进行重新排序。

Syntax: arrange(x, expr)

Parameters:
x: data set to be reordered
expr: logical expression with column name

示例 1：

# R program to reorder a data set 
  
# Loading library
library(dplyr)
  
# Calling dataset
x <- BOD
x
  
# Calling arrange() function
arrange(x, demand)

输出：

Time demand
1    1    8.3
2    2   10.3
3    3   19.0
4    4   16.0
5    5   15.6
6    7   19.8
  Time demand
1    1    8.3
2    2   10.3
3    5   15.6
4    4   16.0
5    3   19.0
6    7   19.8

示例 2：

# R program to reorder a data set 
  
# Loading library
library(dplyr)
  
# Create a data frame 
d <- data.frame( name = c("Abhi", "Bhavesh", "Chaman", "Dimri"),  
                 age = c(7, 5, 9, 16) ) 
    
# Arranging name according to the age 
d.name<- arrange(d, age) 
print(d.name) 

输出：

name age
1 Bhavesh   5
2    Abhi   7
3  Chaman   9
4   Dimri  16