Keep Original Row Order when Merging DataFrame in R

In this article, we are going to merge the dataframe by keeping the original row in the R programming language.

Dataframe in use:

Method 1: Using inner_join()

We can get the ordered merged dataframe by using an inner join. This function is available in dplyr package thus first we need to load the package. inner_join() is used to perform the inner join. It takes two dataframes as input and join the two dataframes based on the common column in both the dataframes.

Syntax:

inner_join(dataframe1,dataframe2)

where

• dataframe1 is the first dataframe
• dataframe2 is the second dataframe

Example: R program to merge two dataframe

R

# load the package
library("dplyr")

# create dataframe1 with id,name and marks
data1 = data.frame(id=c(1, 2, 3, 4, 5),
                   name=c("sravan", "bobby", "ojaswi",
                          "rohith", "gnanesh"),
                   marks=c(100, 98, 79, 80, 67))

# create dataframe2 with id and address
data2 = data.frame(id=c(1, 2, 3, 4, 5),
                   address=c("ponnur", "guntur", "hyd",
                             "hyd", "america"))

# merge the dataframes
inner_join(data1, data2)

Output:

Method 2: Using merge() function

merge() function is used to merge the dataframes.

Syntax:

merge(dataframe1,dataframe2)

where

• dataframe1 is the first dataframe
• dataframe2 is the second dataframe

Example: R program to merge the dataframes using merge() function

R

# create dataframe1 with id,name and marks
data1 = data.frame(id=c(1, 2, 3, 4, 5),
                   name=c("sravan", "bobby", "ojaswi",
                          "rohith", "gnanesh"),
                   marks=c(100, 98, 79, 80, 67))

# create dataframe2 with id and address
data2 = data.frame(id=c(1, 2, 3, 4, 5),
                   address=c("ponnur", "guntur", "hyd",
                             "hyd", "america"))

# merge the dataframes using merge function
merge(data1, data2)

Output: