toJSON function

Convert R To JSON

Convert an R object into a corresponding JSON object.

Lists with unnamed components are not currently supported

toJSON( x, indent=0, method="C" )

Arguments

• x: a vector or list to convert into a JSON object
• indent: an integer specifying how much indentation to use when formatting the JSON object; if 0, no pretty-formatting is used
• method: use the C implementation, or the older slower (and one day to be depricated) R implementation

Returns

a string containing the JSON object

See Also

fromJSON

Examples

x <- list( alpha = 1:5, beta = "Bravo", 
           gamma = list(a=1:3, b=NULL), 
           delta = c(TRUE, FALSE) )
json <- toJSON( x )
fromJSON( json )

#named vectors are treated as JSON objects (lists)
toJSON(islands[1:4])

#data.frames must be converted into a list before converting into JSON
plot(cars, pch=2)
json_cars <- toJSON(as.list(cars))
points( data.frame( fromJSON( json_cars ) ), col="red", pch=3 )

#special R types are encoded as strings
testString <- c(1,2,3,4,NA,NaN,Inf,8,9);
toJSON(testString);