如何将JSON输出的结果解析为数据框？

Question

In trying to analyze tweets from a hashtag, I am able to obtain 100 results at a time via this call.

curl -i "http://otter.topsy.com/search.json?q=esa2012&window=a&perpage=100&offset=0" >> esa2012_0.json

resulting in a file like this (JSON file in link).

How do I read this into R and convert it to a data.frame ?

Thus far I am able to skip the first several (non-JSON) lines like so:

library(XML)
library(RJSONIO)
file0 <- scan(file = "~/Desktop/data/esa2012_0.json", skip = 18, what= "raw")

but the resulting read becomes difficult to coerce.

Answer 1

fromJSON(file0) should do it.

I typically run it with ,simplify=FALSE and construct the data.frame myself rather than trying to have it simplify for me.

Note you don't need the command line call to curl if you use the RCurl library:

library(RJSONIO)
library(RCurl)
j <- getURL("http://blah?mine=yours")
fromJSON(j)