I have a JSON file and want to open the data in weka, but when I do, I get the following error:
Looking around on the mailing list, there are a few questions about JSON, but TL;DR except that I noticed talk of JSON in the "format weka expects". Of course, there was no mention of what that format is. About to take a dive in the source, but I hope SO users can help before I spend too much time on this.
To gain an understanding about the format of the JSON object and its relationship to ARFF. The steps were surprisingly simple. Use the GUI tool to do the following:
basically every JSON file must have: {header:{ relation: , attributes:[{},{}],data:[{},{}]}}}
Hope this helps
{"houses":{
"relation":"house",
"attributes":{
"houseSize":["NUMERIC"],
"lotSize":
"bedrooms":
"granite":
"bathroom":
"sellingPrice":
},
"data":[
[3529,9191,6,0,0,205000 ],
[3247,10061,5,1,1,224900],
[4032,10150,5,0,1,197900 ],
[2397,14156,4,1,0,189900 ],
[2200,9600,4,0,1,195000],
[3536,19994,6,1,1,325000 ],
[2983,9365,5,0,1,230000]
]}}
The attributes can have more information specified to them as follows:
{"contact_lenses":{
"relation": "contact-lenses",
"attributes" : {
"age":["young", "pre-presbyopic", "presbyopic"],
"spectacle-prescrip":["myope", "hypermetrope"],
"astigmatism":["no", "yes"],
"tear-prod-rate":["reduced", "normal"],
"contact-lenses":["soft", "hard", "none"]
},
"data":[]
}
}