Saving a JSON object to file.JSON

Question

I've create a JSON file, and I need to be able to share the file via email with other collaborators. However, although there are plenty of topics available on handling JSON objects in the R workspace, there are virtually no resources discussing how to actually export a JSON object to a .JSON file.

Here's a simple example:

list1 <- vector(mode="list", length=2)   list1[[1]] <- c("a", "b", "c")   list1[[2]] <- c(1, 2, 3)  exportJson <- toJSON(list1)  ## Save the JSON to file save(exportJson, file="export.JSON")  ## Attempt to read in the JSON library("rjson") json_data <- fromJSON(file="export.JSON") 

The final line, attempting to read in the JSON file, results in an error: "Error in fromJSON(file = "export.JSON") : unexpected character 'R'"

Obviously the save() function is not the way to go, but after extensive googling, I have found nothing that says how to export the JSON to a file. Any help would be greatly appreciated.

Answer 1

You can use write:

library(RJSONIO) list1 <- vector(mode="list", length=2) list1[[1]] <- c("a", "b", "c") list1[[2]] <- c(1, 2, 3)  exportJson <- toJSON(list1) > exportJson [1] "[\n [ \"a\", \"b\", \"c\" ],\n[      1,      2,      3 ] \n]" write(exportJson, "test.json") library("rjson") json_data <- fromJSON(file="test.json") > json_data [[1]] [1] "a" "b" "c"  [[2]] [1] 1 2 3