{
 "recode": [ zipcode, "district", "view" ], "bin": [
 { "name": "saleprice"  , "method": "equi-width", "numbins": 3 },
 { "name": "sqft", "method": "equi-width", "numbins": 4 }],
 "dummycode": [ sqft, "saleprice" ]
  }