ConfusionMatrix

java.lang.Object
- water.Iced
- - hex.ConfusionMatrix

All Implemented Interfaces:

java.lang.Cloneable, Freezable
```
public class ConfusionMatrix
extends Iced
```

Nested Class Summary

Nested Classes
Modifier and Type Class and Description

static class ConfusionMatrix.ErrMetric

Nested Classes
Modifier and Type	Class and Description
`static class`	`ConfusionMatrix.ErrMetric`

Field Summary

Fields
Modifier and Type Field and Description

long[][] _arr

double[] _classErr

double _predErr

static DocGen.FieldDoc[] DOC_FIELDS

Fields
Modifier and Type	Field and Description
`long[][]`	`_arr`
`double[]`	`_classErr`
`double`	`_predErr`
`static DocGen.FieldDoc[]`	`DOC_FIELDS`

Constructor Summary

Constructors
Constructor and Description

ConfusionMatrix(int n)

ConfusionMatrix(long[][] value)

ConfusionMatrix(long[][] value, int dim)

Constructors
Constructor and Description
`ConfusionMatrix(int n)`
`ConfusionMatrix(long[][] value)`
`ConfusionMatrix(long[][] value, int dim)`

Method Summary

Methods
Modifier and Type	Method and Description
`double`	`accuracy()` The percentage of predictions that are correct.
`void`	`add(ConfusionMatrix other)`
`void`	`add(int i, int j)`
`double[]`	`classErr()`
`double`	`classErr(int c)`
`long`	`classErrCount(int c)`
`ConfusionMatrix`	`clone()`
`double`	`err()`
`long`	`errCount()`
`double`	`F0point5()` Returns the F-measure which combines precision and recall and weights precision higher than recall.
`double`	`F1()` Returns the F-measure which combines precision and recall in a balanced way.
`double`	`F2()` Returns the F-measure which combines precision and recall and weights recall higher than precision.
`boolean`	`isBinary()`
`double`	`max_per_class_error()` The maximum per-class error
`double`	`mcc()` The Matthews Correlation Coefficient, takes true negatives into account in contrast to F-Score See MCC MCC = Correlation between observed and predicted binary classification
`int`	`nclasses()`
`double`	`precision()` The percentage of positive predictions that are correct.
`double`	`recall()` The percentage of positive labeled instances that were predicted as positive.
`void`	`reComputeErrors()`
`int`	`size()`
`double`	`specificity()` The percentage of negative labeled instances that were predicted as negative.
`void`	`toHTML(java.lang.StringBuilder sb, java.lang.String[] domain)`
`com.google.gson.JsonArray`	`toJson()`
`java.lang.String`	`toString()`
`long`	`totalRows()`

Methods inherited from class water.Iced
frozenType, init, newInstance, read, toDocField, write, writeJSON, writeJSONFields

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

- Field Detail
  - DOC_FIELDS
```
public static DocGen.FieldDoc[] DOC_FIELDS
```
  - _arr
```
@Request.API(help="Confusion matrix (Actual/Predicted)")
public long[][] _arr
```
  - _classErr
```
@Request.API(help="Prediction error by class")
public final double[] _classErr
```
  - _predErr
```
@Request.API(help="Prediction error")
public double _predErr
```
- Constructor Detail
  - ConfusionMatrix
```
public ConfusionMatrix(int n)
```
  - ConfusionMatrix
```
public ConfusionMatrix(long[][] value)
```
  - ConfusionMatrix
```
public ConfusionMatrix(long[][] value,
               int dim)
```
- Method Detail
  - clone
```
public ConfusionMatrix clone()
```
    Overrides:
    
    clone in class Iced
  - add
```
public void add(int i,
       int j)
```
  - classErr
```
public double[] classErr()
```
  - size
```
public final int size()
```
  - reComputeErrors
```
public void reComputeErrors()
```
  - classErrCount
```
public final long classErrCount(int c)
```
  - classErr
```
public final double classErr(int c)
```
  - totalRows
```
public long totalRows()
```
  - add
```
public void add(ConfusionMatrix other)
```
  - err
```
public double err()
```
    Returns:
    overall classification error
  - errCount
```
public long errCount()
```
  - accuracy
```
public double accuracy()
```
    The percentage of predictions that are correct.
  - specificity
```
public double specificity()
```
    The percentage of negative labeled instances that were predicted as negative.
    
    Returns:
    TNR / Specificity
  - recall
```
public double recall()
```
    The percentage of positive labeled instances that were predicted as positive.
    
    Returns:
    Recall / TPR / Sensitivity
  - precision
```
public double precision()
```
    The percentage of positive predictions that are correct.
    
    Returns:
    Precision
  - mcc
```
public double mcc()
```
    The Matthews Correlation Coefficient, takes true negatives into account in contrast to F-Score See MCC MCC = Correlation between observed and predicted binary classification
    
    Returns:
    mcc ranges from -1 (total disagreement) ... 0 (no better than random) ... 1 (perfect)
  - max_per_class_error
```
public double max_per_class_error()
```
    The maximum per-class error
    
    Returns:
    max(classErr(i))
  - nclasses
```
public final int nclasses()
```
  - isBinary
```
public final boolean isBinary()
```
  - F1
```
public double F1()
```
    Returns the F-measure which combines precision and recall in a balanced way.
    See Precision_and_recall
  - F2
```
public double F2()
```
    Returns the F-measure which combines precision and recall and weights recall higher than precision.
    See F1_score
  - F0point5
```
public double F0point5()
```
    Returns the F-measure which combines precision and recall and weights precision higher than recall.
    See F1_score
  - toString
```
public java.lang.String toString()
```
    Overrides:
    
    toString in class java.lang.Object
  - toJson
```
public com.google.gson.JsonArray toJson()
```
  - toHTML
```
public void toHTML(java.lang.StringBuilder sb,
          java.lang.String[] domain)
```

Class ConfusionMatrix

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class water.Iced

Methods inherited from class java.lang.Object

Field Detail

DOC_FIELDS

_arr

_classErr

_predErr

Constructor Detail

ConfusionMatrix

ConfusionMatrix

ConfusionMatrix

Method Detail

clone

add

classErr

size

reComputeErrors

classErrCount

classErr

totalRows

add

err

errCount

accuracy

specificity

recall

precision

mcc

max_per_class_error

nclasses

isBinary

F1

F2

F0point5

toString

toJson

toHTML