0
public static Dataset<LabeledPoint> convertRDDStringToLabeledPoint(Dataset<String> data,String delimiter) {
Dataset<LabeledPoint> labeledPointData = data.map(
(data1)->{
String splitter[] = data1.split(delimiter);
double[] arr = new double[splitter.length - 1];
IntStream.range(0,arr.length).forEach(i->arr[i]=Double.parseDouble(splitter[i+1]));
return new LabeledPoint(Double.parseDouble(splitter[0]), Vectors.dense(arr));
},Encoders.???);
return labeledPointData;
}
如何設置LabeledPointData的編碼器,它是Double,Double的向量的組合。如何設置用於創建DataFrame的編碼器?如何在Spark中爲Row,LabeledPointData設置編碼器?