Get All Factor Levels of DataFrame Column in R

Calculate difference between columns of R DataFrame

Last Updated : 26 Jan, 2022

Generally, the difference between two columns can be calculated from a dataframe that contains some numeric data. In this article, we will discuss how the difference between columns can be calculated in the R programming language.

Approach

Create a dataframe and the columns should be of numeric or integer data type so that we can find the difference between them.
Extract required data from columns using the $ operator into separate variables. For example, we have two columns then extract individual columns into separate variables.
Then perform the minus operation for the difference between those columns.
Finally, print the result.

Example 1 :

R

# creating a dataframe
df=data.frame(num=c(1,2,3,4),num1=c(5,4,3,2))  

# Extracting column 1
a=df$num 

# Extracting column 2
b=df$num1 

# printing dataframe 
print(df) 

# printing difference among 
# two columns 
print(b-a)

Output :

Example 2 :

R

# creating a dataframe with some
# numeric data
df=data.frame(num=c(1.9,2.9,3.4,5.6,9.8),
              num1=c(6.3,7.7,8.0,9.3,10.9)) 
print(df) 

# extracting column 1 into a 
# variable called a 
a=df$num 

# extracting column 2 into a
# variable called b
b=df$num1 

# printing the difference between 
# two columns 
print(b-a)

Output :

Example 3 :

R

# creating a dataframe with 
# some numeric data
df=data.frame(num=c(1,2,3,4,5),
              num1=c(6,7,8,9,10))

# extracting column 1 into a
# variable called a 
a=df$num 

# extracting column 2 into a
# variable called b
b=df$num1

# printing the dataframe
print(df) 

# printing the difference 
# between two columns 
print(b-a)

Output :

Get All Factor Levels of DataFrame Column in R

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