如何在 R 中按名称选择多个 DataFrame 列？

在本文中，我们将讨论如何在 R 编程语言中按名称从 DataFrame 中选择多个列。为了获得多列，我们将使用列表数据结构。通过使用列表，我们可以传递用逗号分隔的数据框列。然后，我们可以使用 list()函数获取列表

语法：

list(dataframe_name$column1,dataframe_name$column2,.,dataframe_name$column n)

示例 1：

R

# create a vector with student id
vector1=c(7058,7059,7075,7076)
  
# create a vector with student name
vector2=c("Sravan kumar","Jyothika",
          "Deepika","Kyathi")
  
# create a vector with student address
vector3=c("ponnur","tenali","repalle",
          "ponnur")
  
# pass these vectors to the dataframe
dataframe1=data.frame(id=vector1,names=vector2,
                      address=vector3)
  
print(dataframe1)
  
# select multiple columns from the
# dataframe1 using list datastructure
a=list(dataframe1$id,dataframe1$names,dataframe1$address)
  
print(a)

输出：

示例 2 ：

电阻

# create a vector with student id
vector1=c(7058,7059,7075,7076)
  
# create a vector with student name
vector2=c("Sravan kumar","Jyothika",
          "Deepika","Kyathi")
  
# create a vector with student address
vector3=c("ponnur","tenali","repalle","ponnur")
  
# pass these vectors to the dataframe
dataframe1=data.frame(id=vector1,names=vector2,
                      address=vector3)
  
print(dataframe1)
  
# select multiple columns from the
# dataframe1 using list datastructure
a=list(dataframe1$id,dataframe1$names)
  
print(a)

输出：