在 R 编程中读取 CSV 文件的内容 – read.csv()函数

R 语言中的read.csv()函数用于读取“逗号分隔值”文件。它以数据框的形式导入数据。

Syntax:
read.csv(file, header, sep, dec)

Parameters:
file: the path to the file containing the data to be imported into R.
header: logical value. If TRUE, read.csv() assumes that your file has a header row, so row 1 is the name of each column. If that’s not the case, you can add the argument header = FALSE.
sep: the field separator character
dec: the character used in the file for decimal points.

示例 1：从同一文件夹中读取文件

# R program to read a csv file
  
# Get content into a data frame 
data <- read.csv("CSVFileExample.csv",  
                  header = FALSE, sep = "\t") 
    
# Printing content of Text File 
print(data) 

输出：

V1 V2 V3
1 100 AB ab
2 200 CD cd
3 300 EF ef
4 400 GH gh
5 500 IJ ij

示例 2：从不同目录读取文件

# Simple R program to read csv file 
x <- read.csv("D://Datas//myfile.csv") 
    
# print x 
print(x) 

输出：

X  V1 V2 V3
1 1 100 a1 b1
2 2 200 a2 b2
3 3 300 a3 b3