R - csv读写

注意：csv数据“,”后面的空格也会被算入新的字段，","前后不要有空格。

读取csv文件加载为dataframe:

df <- read.csv('play.csv', header = TRUE, sep = ",")

查看内容：

> df

    Outlook Temperature Humidity Windy Play
1     sunny         hot     high FALSE   no
2     sunny         hot     high  TRUE   no
3  overcast         hot     high FALSE  yes
4     rainy        mild     high FALSE  yes
5     rainy        cool   normal FALSE  yes
6     rainy        cool   normal  TRUE   no
7  overcast        cool   normal  TRUE  yes
8     sunny        mild     high FALSE   no
9     sunny        cool   normal FALSE  yes
10    rainy        mild   normal FALSE  yes
11    sunny        mild   normal  TRUE  yes
12 overcast        mild     high  TRUE  yes
13 overcast         hot   normal FALSE  yes
14    rainy        mild     high  TRUE   no

将dataframe写入csv文件中：

write.csv(df, file = "result.csv")