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

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

Direct Known Subclasses:

UnderSamplingByMaskingMultiDataSetPreProcessor, UnderSamplingByMaskingPreProcessor
```
public abstract class BaseUnderSamplingPreProcessor
extends Object
```

Field Summary

Fields
Modifier and Type Field Description

protected int tbpttWindowSize

Constructor Summary

Constructors
Constructor Description

BaseUnderSamplingPreProcessor()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`INDArray`	`adjustMasks(INDArray label, INDArray labelMask, int minorityLabel, double targetDist)`
`void`	`donotMaskAllMajorityWindows()`	If a tbptt segment is all majority class labels default behaviour is to mask all time steps in the segment.
`void`	`donotMaskMinorityWindows()`	If set will not mask timesteps if they fall in a tbptt segment with at least one minority class label

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

- Field Detail
  - tbpttWindowSize
```
protected int tbpttWindowSize
```
- Constructor Detail
  - BaseUnderSamplingPreProcessor
```
public BaseUnderSamplingPreProcessor()
```
- Method Detail
  - donotMaskAllMajorityWindows
```
public void donotMaskAllMajorityWindows()
```
    If a tbptt segment is all majority class labels default behaviour is to mask all time steps in the segment. donotMaskAllMajorityWindows() will override the default and mask (1-targetDist)% of the time steps
  - donotMaskMinorityWindows
```
public void donotMaskMinorityWindows()
```
    If set will not mask timesteps if they fall in a tbptt segment with at least one minority class label
  - adjustMasks
```
public INDArray adjustMasks(INDArray label,
                            INDArray labelMask,
                            int minorityLabel,
                            double targetDist)
```