How do I use a JSON file with weka

问题

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.

回答1:

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:

Select the Explorer Option
Select open file on the preprocess tab
Load any of the default supplied ARFF files
The select save which you can then choose the JSON extension

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":[]
}

}

来源：https://stackoverflow.com/questions/9998871/how-do-i-use-a-json-file-with-weka

标签

json

weka