UnderSamplingByMaskingPreProcessor (nd4j-api 1.0.0-M2.1 API)

java.lang.Object
- org.nd4j.linalg.dataset.api.preprocessor.classimbalance.BaseUnderSamplingPreProcessor
- - org.nd4j.linalg.dataset.api.preprocessor.classimbalance.UnderSamplingByMaskingPreProcessor

All Implemented Interfaces:: Serializable, DataSetPreProcessor

public class UnderSamplingByMaskingPreProcessor
extends BaseUnderSamplingPreProcessor
implements DataSetPreProcessor

See Also:: Serialized Form

Field Summary
- Fields inherited from class org.nd4j.linalg.dataset.api.preprocessor.classimbalance.BaseUnderSamplingPreProcessor
  tbpttWindowSize

Constructor Summary

Constructors
Constructor Description

UnderSamplingByMaskingPreProcessor(double targetDist, int windowSize)
The target distribution to approximate.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`overrideMinorityDefault()`	Will change the default minority label from "1" to "0" and correspondingly the majority class from "0" to "1"
`void`	`preProcess(DataSet toPreProcess)`	Pre process a dataset

Methods inherited from class org.nd4j.linalg.dataset.api.preprocessor.classimbalance.BaseUnderSamplingPreProcessor
adjustMasks, donotMaskAllMajorityWindows, donotMaskMinorityWindows

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - UnderSamplingByMaskingPreProcessor
```
public UnderSamplingByMaskingPreProcessor(double targetDist,
                                          int windowSize)
```
    The target distribution to approximate. Valid values are between (0,0.5]. Eg. For a targetDist = 0.25 and tbpttWindowSize = 100: Every 100 time steps (starting from the last time step) will randomly mask majority time steps to approximate a 25:75 ratio of minorityLabel to majority classes
    
    Parameters:
    
    targetDist -
    
    windowSize - Usually set to the size of the tbptt
- Method Detail
  - overrideMinorityDefault
```
public void overrideMinorityDefault()
```
    Will change the default minority label from "1" to "0" and correspondingly the majority class from "0" to "1"
  - preProcess
```
public void preProcess(DataSet toPreProcess)
```
    Description copied from interface: DataSetPreProcessor
    
    Pre process a dataset
    
    Specified by:
    
    preProcess in interface DataSetPreProcessor
    
    Parameters:
    
    toPreProcess - the data set to pre process