Java 类名:com.alibaba.alink.operator.batch.dataproc.vector.VectorMinMaxScalerTrainBatchOp
Python 类名:VectorMinMaxScalerTrainBatchOp
vector归一化是对vector数据进行归一化处理的组件, 将数据归一到minValue和maxValue之间,value最终结果为 (value - min) / (max - min) * (maxValue - minValue) + minValue,最终结果的范围为[minValue, maxValue]。
minValue和maxValue由用户指定,默认为0和1。输入的向量维度可以不相同。
该组件为训练组件,生成的结果为模型。
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] | |
max | 归一化的上界 | 归一化的上界 | Double | 1.0 | ||
min | 归一化的下界 | 归一化的下界 | Double | 0.0 |
from pyalink.alink import * import pandas as pd useLocalEnv(1) df = pd.DataFrame([ ["a", "10.0, 100"], ["b", "-2.5, 9"], ["c", "100.2, 1"], ["d", "-99.9, 100"], ["a", "1.4, 1"], ["b", "-2.2, 9"], ["c", "100.9, 1"] ]) data = BatchOperator.fromDataframe(df, schemaStr="col string, vec string") trainOp = VectorMinMaxScalerTrainBatchOp()\ .setSelectedCol("vec") model = trainOp.linkFrom(data) batchPredictOp = VectorMinMaxScalerPredictBatchOp() batchPredictOp.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.VectorMinMaxScalerPredictBatchOp; import com.alibaba.alink.operator.batch.dataproc.vector.VectorMinMaxScalerTrainBatchOp; import com.alibaba.alink.operator.batch.source.MemSourceBatchOp; import org.junit.Test; import java.util.Arrays; import java.util.List; public class VectorMinMaxScalerTrainBatchOpTest { @Test public void testVectorMinMaxScalerTrainBatchOp() throws Exception { List <Row> df = Arrays.asList( Row.of("a", "10.0, 100"), Row.of("b", "-2.5, 9"), Row.of("c", "100.2, 1"), Row.of("d", "-99.9, 100"), Row.of("a", "1.4, 1"), Row.of("b", "-2.2, 9"), Row.of("c", "100.9, 1") ); BatchOperator <?> data = new MemSourceBatchOp(df, "col string, vec string"); BatchOperator <?> trainOp = new VectorMinMaxScalerTrainBatchOp() .setSelectedCol("vec"); BatchOperator <?> model = trainOp.linkFrom(data); BatchOperator <?> batchPredictOp = new VectorMinMaxScalerPredictBatchOp(); batchPredictOp.linkFrom(model, data).print(); } }
col | vec |
---|---|
a | 0.5473107569721115 1.0 |
b | 0.4850597609561753 0.08080808080808081 |
c | 0.9965139442231076 0.0 |
d | 0.0 1.0 |
a | 0.5044820717131474 0.0 |
b | 0.4865537848605578 0.08080808080808081 |
c | 1.0 0.0 |