How to do it...

Once the files are ready, load the jsonlite package and read the files as follows:

1. Load the library:

> library(jsonlite) 

1. Load the JSON data from the files:

> dat.1 <- fromJSON("students.json") 
> dat.2 <- fromJSON("student-courses.json") 

1. Load the JSON document from the web:

> url <- "http://finance.yahoo.com/webservice/v1/symbols/allcurrencies/quote?format=json" 
> jsonDoc <- fromJSON(url) 

1. Extract the data into data frames:

> dat <- jsonDoc$list$resources$resource$fields 
> dat.1 <- jsonDoc$list$resources$resource$fields 
> dat.2 <- jsonDoc$list$resources$resource$fields 

1. Verify the results:

> dat[1:2,] 
> dat.1[1:3,] 
> dat.2[,c(1,2,4:5)]