NormalizationCatalog.NormalizeSupervisedBinning 方法
定义
重要
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重载
| NormalizeSupervisedBinning(TransformsCatalog, InputOutputColumnPair[], String, Int64, Boolean, Int32, Int32) |
创建一个 NormalizingEstimator，它根据与列的关联 |
| NormalizeSupervisedBinning(TransformsCatalog, String, String, String, Int64, Boolean, Int32, Int32) |
创建一个 NormalizingEstimator，它根据与列的关联 |
NormalizeSupervisedBinning(TransformsCatalog, InputOutputColumnPair[], String, Int64, Boolean, Int32, Int32)
创建一个 NormalizingEstimator，它根据与列的关联 labelColumnName 将数据分配到箱中来规范化。
public static Microsoft.ML.Transforms.NormalizingEstimator NormalizeSupervisedBinning (this Microsoft.ML.TransformsCatalog catalog, Microsoft.ML.InputOutputColumnPair[] columns, string labelColumnName = "Label", long maximumExampleCount = 1000000000, bool fixZero = true, int maximumBinCount = 1024, int mininimumExamplesPerBin = 10);static member NormalizeSupervisedBinning : Microsoft.ML.TransformsCatalog * Microsoft.ML.InputOutputColumnPair[] * string * int64 * bool * int * int -> Microsoft.ML.Transforms.NormalizingEstimator<Extension()>
Public Function NormalizeSupervisedBinning (catalog As TransformsCatalog, columns As InputOutputColumnPair(), Optional labelColumnName As String = "Label", Optional maximumExampleCount As Long = 1000000000, Optional fixZero As Boolean = true, Optional maximumBinCount As Integer = 1024, Optional mininimumExamplesPerBin As Integer = 10) As NormalizingEstimator参数
- catalog
- TransformsCatalog
转换目录
- columns
- InputOutputColumnPair[]
输入和输出列对。 输入列必须是数据类型 Single， Double 或者是这些类型的已知大小的向量。 输出列的数据类型将与关联的输入列相同。
- labelColumnName
- String
受监督装箱的标签列的名称。
- maximumExampleCount
- Int64
用于训练规范化器的最大示例数。
- fixZero
- Boolean
是否将零映射到零，保留稀疏。
- maximumBinCount
- Int32
建议的 2 个) (最大箱数。
- mininimumExamplesPerBin
- Int32
每个箱的最小示例数。
返回
适用于
NormalizeSupervisedBinning(TransformsCatalog, String, String, String, Int64, Boolean, Int32, Int32)
创建一个 NormalizingEstimator，它根据与列的关联 labelColumnName 将数据分配到箱中来规范化。
public static Microsoft.ML.Transforms.NormalizingEstimator NormalizeSupervisedBinning (this Microsoft.ML.TransformsCatalog catalog, string outputColumnName, string inputColumnName = default, string labelColumnName = "Label", long maximumExampleCount = 1000000000, bool fixZero = true, int maximumBinCount = 1024, int mininimumExamplesPerBin = 10);static member NormalizeSupervisedBinning : Microsoft.ML.TransformsCatalog * string * string * string * int64 * bool * int * int -> Microsoft.ML.Transforms.NormalizingEstimator<Extension()>
Public Function NormalizeSupervisedBinning (catalog As TransformsCatalog, outputColumnName As String, Optional inputColumnName As String = Nothing, Optional labelColumnName As String = "Label", Optional maximumExampleCount As Long = 1000000000, Optional fixZero As Boolean = true, Optional maximumBinCount As Integer = 1024, Optional mininimumExamplesPerBin As Integer = 10) As NormalizingEstimator参数
- catalog
- TransformsCatalog
转换目录
- outputColumnName
- String
由转换 inputColumnName生成的列的名称。
此列上的数据类型与输入列相同。
- inputColumnName
- String
要转换的列的名称。 If set to null, the value of the outputColumnName will be used as source.
此列上的数据类型应为SingleDouble已知大小的向量，或这些类型的已知大小向量。
- labelColumnName
- String
受监督装箱的标签列的名称。
- maximumExampleCount
- Int64
用于训练规范化器的最大示例数。
- fixZero
- Boolean
是否将零映射到零，保留稀疏。
- maximumBinCount
- Int32
建议的 2 个) (最大箱数。
- mininimumExamplesPerBin
- Int32
每个箱的最小示例数。
返回
示例
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Linq;
using Microsoft.ML;
using Microsoft.ML.Data;
using static Microsoft.ML.Transforms.NormalizingTransformer;
namespace Samples.Dynamic
{
public class NormalizeSupervisedBinning
{
public static void Example()
{
// Create a new ML context, for ML.NET operations. It can be used for
// exception tracking and logging, as well as the source of randomness.
var mlContext = new MLContext();
var samples = new List<DataPoint>()
{
new DataPoint(){ Features = new float[4] { 8, 1, 3, 0},
Bin ="Bin1" },
new DataPoint(){ Features = new float[4] { 6, 2, 2, 1},
Bin ="Bin2" },
new DataPoint(){ Features = new float[4] { 5, 3, 0, 2},
Bin ="Bin2" },
new DataPoint(){ Features = new float[4] { 4,-8, 1, 3},
Bin ="Bin3" },
new DataPoint(){ Features = new float[4] { 2,-5,-1, 4},
Bin ="Bin3" }
};
// Convert training data to IDataView, the general data type used in
// ML.NET.
var data = mlContext.Data.LoadFromEnumerable(samples);
// Let's transform "Bin" column from string to key.
data = mlContext.Transforms.Conversion.MapValueToKey("Bin").Fit(data)
.Transform(data);
// NormalizeSupervisedBinning normalizes the data by constructing bins
// based on correlation with the label column and produce output based
// on to which bin original value belong.
var normalize = mlContext.Transforms.NormalizeSupervisedBinning(
"Features", labelColumnName: "Bin", mininimumExamplesPerBin: 1,
fixZero: false);
// NormalizeSupervisedBinning normalizes the data by constructing bins
// based on correlation with the label column and produce output based
// on to which bin original value belong but make sure zero values would
// remain zero after normalization. Helps preserve sparsity.
var normalizeFixZero = mlContext.Transforms.NormalizeSupervisedBinning(
"Features", labelColumnName: "Bin", mininimumExamplesPerBin: 1,
fixZero: true);
// Now we can transform the data and look at the output to confirm the
// behavior of the estimator. This operation doesn't actually evaluate
// data until we read the data below.
var normalizeTransform = normalize.Fit(data);
var transformedData = normalizeTransform.Transform(data);
var normalizeFixZeroTransform = normalizeFixZero.Fit(data);
var fixZeroData = normalizeFixZeroTransform.Transform(data);
var column = transformedData.GetColumn<float[]>("Features").ToArray();
foreach (var row in column)
Console.WriteLine(string.Join(", ", row.Select(x => x.ToString(
"f4"))));
// Expected output:
// 1.0000, 0.5000, 1.0000, 0.0000
// 0.5000, 1.0000, 0.0000, 0.5000
// 0.5000, 1.0000, 0.0000, 0.5000
// 0.0000, 0.0000, 0.0000, 1.0000
// 0.0000, 0.0000, 0.0000, 1.0000
var columnFixZero = fixZeroData.GetColumn<float[]>("Features")
.ToArray();
foreach (var row in columnFixZero)
Console.WriteLine(string.Join(", ", row.Select(x => x.ToString(
"f4"))));
// Expected output:
// 1.0000, 0.0000, 1.0000, 0.0000
// 0.5000, 0.5000, 0.0000, 0.5000
// 0.5000, 0.5000, 0.0000, 0.5000
// 0.0000,-0.5000, 0.0000, 1.0000
// 0.0000,-0.5000, 0.0000, 1.0000
// Let's get transformation parameters. Since we work with only one
// column we need to pass 0 as parameter for
// GetNormalizerModelParameters.
// If we have multiple columns transformations we need to pass index of
// InputOutputColumnPair.
var transformParams = normalizeTransform.GetNormalizerModelParameters(0)
as BinNormalizerModelParameters<ImmutableArray<float>>;
Console.WriteLine($"The 1-index value in resulting array would be " +
$"produce by:");
Console.WriteLine("y = (Index(x) / " + transformParams.Density[0] +
") - " + (transformParams.Offset.Length == 0 ? 0 : transformParams
.Offset[0]));
Console.WriteLine("Where Index(x) is the index of the bin to which " +
"x belongs");
Console.WriteLine("Bins upper borders are: " + string.Join(" ",
transformParams.UpperBounds[0]));
// Expected output:
// The 1-index value in resulting array would be produce by:
// y = (Index(x) / 2) - 0
// Where Index(x) is the index of the bin to which x belongs
// Bins upper bounds are: 4.5 7 ∞
var fixZeroParams = normalizeFixZeroTransform
.GetNormalizerModelParameters(0) as BinNormalizerModelParameters<
ImmutableArray<float>>;
Console.WriteLine($"The 1-index value in resulting array would be " +
$"produce by:");
Console.WriteLine(" y = (Index(x) / " + fixZeroParams.Density[1] +
") - " + (fixZeroParams.Offset.Length == 0 ? 0 : fixZeroParams
.Offset[1]));
Console.WriteLine("Where Index(x) is the index of the bin to which x " +
"belongs");
Console.WriteLine("Bins upper borders are: " + string.Join(" ",
fixZeroParams.UpperBounds[1]));
// Expected output:
// The 1-index value in resulting array would be produce by:
// y = (Index(x) / 2) - 0.5
// Where Index(x) is the index of the bin to which x belongs
// Bins upper bounds are: -2 1.5 ∞
}
private class DataPoint
{
[VectorType(4)]
public float[] Features { get; set; }
public string Bin { get; set; }
}
}
}