R DataFrame轉vector用法及代碼示例

在本文中，我們將討論如何在 R 中將數據幀轉換為向量。對於將數據幀轉換為向量，我們可以簡單地將數據幀列名稱傳遞為 [[index]]。

方法：

我們在 DataFrame 中取一列，並通過選擇方法將其傳遞給另一個變量。選擇方法可以定義為使用“[[]]”從 DataFrame 中選擇一列。

創建 DataFrame
對創建的 DataFrame 中的列應用選擇過程。
驗證結果變量。

用法:

convert_data = dataframe_name[[‘column_name’]]

下麵給出了使用這種方法來產生這個函數的實現。

範例1：

R


# creating a vector for names
names=c('sravan','bobby','ojaswi','gnanesh','rohith','satwik')
  
# creating vector for marks 1
marks1=c(96,76,82,89,100,94)
  
# creating vector for marks 2
marks2=c(98,79,98,78,98,89)
  
# display all details
print(names)
print(marks1)
print(marks2)
print("----------------------")
  
# passing vectors to the data frame
Final_data = data.frame(names,marks1,marks2)
  
# display data frame
print(Final_data)
print("-------------------conversion---------------------")
  
# converting marks1 dataframe column into vector
# by passing as index
convert_data1 = Final_data[['marks1']]
print(convert_data1)
  
# converting marks2 dataframe column into vector 
# by passing as index
convert_data2 = Final_data[['marks2']]
print(convert_data2)

輸出：

範例2：

R


# creating a vector for subjects
subjects=c('java','python','c/c++')
  
# creating vector for teachers
teachers=c('ravi','swapna','sai')
  
# creating vector for pass percentage
pass=c(98.11,90.45,95)
  
# display all details
print(subjects)
print(teachers)
print(pass)
print("----------------------")
  
# passing vectors to the data frame
Final_data = data.frame(subjects,teachers,pass)
  
# display data frame
print(Final_data)
print("-------------------conversion---------------------")
  
# converting subjects dataframe column into 
# vector by passing as index
convert_data1 = Final_data[['subjects']]
print(convert_data1)
  
# converting teachers dataframe column into 
# vector by passing as index
convert_data2 = Final_data[['teachers']]
print(convert_data2)
  
# converting pass dataframe column into vector
# by passing as index
convert_data2 = Final_data[['pass']]
print(convert_data2)

輸出：

相關用法

注：本文由純淨天空篩選整理自sravankumar8128大神的英文原創作品 Convert DataFrame to vector in R。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。