R JSON File
JSON stands for JavaScript Object Notation. It is a lightweight format for storing and transporting data. JSON file is often used when data is sent from a server to a web page. It often stores data as text in human readable format. R can read JSON file using the rjson package.
Install rjson Package
To install rjson package use the following command:
install.packages("rjson")
Create a JSON File
Copy the following code into notepad or any other text editor and save this file with a .json extension.
{
"ID":["1","2","3","4","5" ],
"Name":["Nikita","Deep","Aman","Nidhi","Sonu" ],
"Salary":["50000","20000","25000","23000","30000" ],
"StartDate":[ "1/1/2018","9/23/2014","11/15/2017","5/11/2015","3/27/2019"],
"Dept":[ "IT","Operations","IT","HR","Finance"]
}
Read the JSON File
fromJSON() function is used to read the JSON file in R. It is stored as a list in R.
Example:
# Load the package required package.
library("rjson")
result <- fromJSON(file = "Student.json")
# Print the result.
print(result)
Output:
$ID
[1] "1" "2" "3" "4" "5"
$Name
[1] "Nikita" "Deep" "Aman" "Nidhi" "Sonu"
$Salary
[1] "50000" "20000" "25000" "23000" "30000"
$StartDate
[1] "1/1/2018" "9/23/2014" "11/15/2017" "5/11/2015" "3/27/2019"
$Dept
[1] "IT" "Operations" "IT" "HR" "Finance"
Convert JSON to a Data Frame
We can convert the JSON data which is extracted from fromJson() function into the form of data frame. For this R provides a function i.e. as.data.frame() function.
Example:
# Load the package required to read JSON files.
library("rjson")
# Give the input file name to the function.
result <- fromJSON(file = "Student.json")
# Convert JSON file to a data frame.
df <- as.data.frame(result)
print(df)
Output:
ID Name Salary StartDate Dept 1 1 Nikita 50000 1/1/2018 IT 2 2 Deep 20000 9/23/2014 Operations 3 3 Aman 25000 11/15/2017 IT 4 4 Nidhi 23000 5/11/2015 HR 5 5 Sonu 30000 3/27/2019 FinanceReference: https://stackoverflow.com/questions/2617600/importing-data-from-a-json-file-into-r