Java 类名:com.alibaba.alink.pipeline.dataproc.vector.VectorMaxAbsScaler
Python 类名:VectorMaxAbsScaler
功能介绍
| 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 | ✓ | ||
| modelFilePath | 模型的文件路径 | 模型的文件路径 | String | null | ||
| outputCol | 输出结果列 | 输出结果列列名,可选,默认null | String | null | ||
| overwriteSink | 是否覆写已有数据 | 是否覆写已有数据 | Boolean | false | ||
| numThreads | 组件多线程线程个数 | 组件多线程线程个数 | Integer | 1 | ||
| modelStreamFilePath | 模型流的文件路径 | 模型流的文件路径 | String | null | ||
| modelStreamScanInterval | 扫描模型路径的时间间隔 | 描模型路径的时间间隔,单位秒 | Integer | 10 | ||
| modelStreamStartTime | 模型流的起始时间 | 模型流的起始时间。默认从当前时刻开始读。使用yyyy-mm-dd hh:mm:ss.fffffffff格式,详见Timestamp.valueOf(String s) | String | null |
代码示例
Python 代码
from pyalink.alink import *import pandas as pduseLocalEnv(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")res = VectorMaxAbsScaler()\.setSelectedCol("vec")model = res.fit(data)model.transform(data).collectToDataframe()
Java 代码
import org.apache.flink.types.Row;import com.alibaba.alink.operator.batch.BatchOperator;import com.alibaba.alink.operator.batch.source.MemSourceBatchOp;import com.alibaba.alink.pipeline.dataproc.vector.VectorMaxAbsScaler;import com.alibaba.alink.pipeline.dataproc.vector.VectorMaxAbsScalerModel;import org.junit.Test;import java.util.Arrays;import java.util.List;public class VectorMaxAbsScalerTest {@Testpublic void testVectorMaxAbsScaler() 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");VectorMaxAbsScaler res = new VectorMaxAbsScaler().setSelectedCol("vec");VectorMaxAbsScalerModel model = res.fit(data);model.transform(data).print();}}
运行结果
| col1 | vec | | —- | —- |
| c | 1.0,0.01 |
| b | -0.024777006937561942,0.09 |
| d | -0.9900891972249752,1.0 |
| a | 0.09910802775024777,1.0 |
| b | -0.02180376610505451,0.09 |
| c | 0.9930624380574826,0.01 |
| a | 0.013875123885034686,0.01 |
