Java 类名:com.alibaba.alink.operator.batch.dataproc.vector.VectorImputerTrainBatchOp
Python 类名:VectorImputerTrainBatchOp
训练Vecotor 缺失值填充模型的组件,输出模型。
填充策略包含最大值,最小值,均值和指定数值4种。
名称 | 中文名称 | 描述 | 类型 | 是否必须? | 取值范围 | 默认值 |
---|---|---|---|---|---|---|
selectedCol | 选中的列名 | 计算列对应的列名 | String | ✓ | 所选列类型为 [DENSE_VECTOR, SPARSE_VECTOR, STRING, VECTOR] | |
fillValue | 填充缺失值 | 自定义的填充值。当strategy为value时,读取fillValue的值 | Double | null | ||
strategy | 缺失值填充规则 | 缺失值填充的规则,支持mean,max,min或者value。选择value时,需要读取fillValue的值 | String | “MEAN”, “MIN”, “MAX”, “VALUE” | “MEAN” |
from pyalink.alink import * import pandas as pd useLocalEnv(1) df = pd.DataFrame([ ["1:3,2:4,4:7", 1], ["1:3,2:NaN", 3], ["2:4,4:5", 4] ]) data = BatchOperator.fromDataframe(df, schemaStr="vec string, id bigint") vecFill = VectorImputerTrainBatchOp().setSelectedCol("vec") model = data.link(vecFill) VectorImputerPredictBatchOp().setOutputCol("vec1").linkFrom(model, data).print()
import org.apache.flink.types.Row; import com.alibaba.alink.operator.batch.BatchOperator; import com.alibaba.alink.operator.batch.dataproc.vector.VectorImputerPredictBatchOp; import com.alibaba.alink.operator.batch.dataproc.vector.VectorImputerTrainBatchOp; import com.alibaba.alink.operator.batch.source.MemSourceBatchOp; import org.junit.Test; import java.util.Arrays; import java.util.List; public class VectorImputerTrainBatchOpTest { @Test public void testVectorImputerTrainBatchOp() throws Exception { List <Row> df = Arrays.asList( Row.of("1:3,2:4,4:7", 1), Row.of("1:3,2:NaN", 3), Row.of("2:4,4:5", 4) ); BatchOperator <?> data = new MemSourceBatchOp(df, "vec string, id int"); BatchOperator <?> vecFill = new VectorImputerTrainBatchOp().setSelectedCol("vec"); BatchOperator <?> model = data.link(vecFill); new VectorImputerPredictBatchOp().setOutputCol("vec1").linkFrom(model, data).print(); } }
vec | id | vec1 |
---|---|---|
1:3,2:4,4:7 | 1 | 1:3.0 2:4.0 4:7.0 |
1:3,2:NaN | 3 | 1:3.0 2:4.0 |
2:4,4:5 | 4 | 2:4.0 4:5.0 |