/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.examples.java.ml.util;
import org.apache.flink.api.java.DataSet;
import org.apache.flink.api.java.ExecutionEnvironment;
import org.apache.flink.examples.java.ml.LinearRegression.Data;
import org.apache.flink.examples.java.ml.LinearRegression.Params;
import java.util.LinkedList;
import java.util.List;
/**
* Provides the default data sets used for the Linear Regression example
* program. The default data sets are used, if no parameters are given to the
* program.
*/
public class LinearRegressionData {
// We have the data as object arrays so that we can also generate Scala Data
// Sources from it.
public static final Object[][] PARAMS = new Object[][] { new Object[] {
0.0, 0.0 } };
public static final Object[][] DATA = new Object[][] {
new Object[] { 0.5, 1.0 }, new Object[] { 1.0, 2.0 },
new Object[] { 2.0, 4.0 }, new Object[] { 3.0, 6.0 },
new Object[] { 4.0, 8.0 }, new Object[] { 5.0, 10.0 },
new Object[] { 6.0, 12.0 }, new Object[] { 7.0, 14.0 },
new Object[] { 8.0, 16.0 }, new Object[] { 9.0, 18.0 },
new Object[] { 10.0, 20.0 }, new Object[] { -0.08, -0.16 },
new Object[] { 0.13, 0.26 }, new Object[] { -1.17, -2.35 },
new Object[] { 1.72, 3.45 }, new Object[] { 1.70, 3.41 },
new Object[] { 1.20, 2.41 }, new Object[] { -0.59, -1.18 },
new Object[] { 0.28, 0.57 }, new Object[] { 1.65, 3.30 },
new Object[] { -0.55, -1.08 } };
public static DataSet<Params> getDefaultParamsDataSet(
ExecutionEnvironment env) {
List<Params> paramsList = new LinkedList<Params>();
for (Object[] params : PARAMS) {
paramsList.add(new Params((Double) params[0], (Double) params[1]));
}
return env.fromCollection(paramsList);
}
public static DataSet<Data> getDefaultDataDataSet(ExecutionEnvironment env) {
List<Data> dataList = new LinkedList<Data>();
for (Object[] data : DATA) {
dataList.add(new Data((Double) data[0], (Double) data[1]));
}
return env.fromCollection(dataList);
}
}