TimeSeriesDataset (jaicore-ml 0.1.4 API)

java.lang.Object
- ai.libs.jaicore.ml.tsc.dataset.TimeSeriesDataset

```
public class TimeSeriesDataset
extends java.lang.Object
```
Dataset for time series.
The dataset consists of a value matrices and timestamp matrices. In the univariate case, there exists one value matrix, either with or without a corresponding timestamp matrix. In the multivariate case there exists multiple value matrices, each either with or without a corresponding timestamp matrix. Each value matrix is associated with an integer index. Each timestamp matrix is associated with an integer index. Two corresponding value and timestamp matrices are associated with the same index. The dimensions of two corresponding value and timestamp matrices are assured to be the same. All value matrices have the same number of rows, but not necessarily the same number of columns. The i-th row of each matrix corresponds to the i-th instance of the dataset.

The targets contained in this dataset are always integers. The can be mapped back and forth with the ClassMapper. Targets are represented as an integer array. The i-th entry of this array corresponds to the i-th instance of the dataset.

Constructor Summary

Constructors
Constructor and Description
`TimeSeriesDataset(java.util.List<double[][]> valueMatrices)` Creates a time series dataset without timestamps for testing.
`TimeSeriesDataset(java.util.List<double[][]> valueMatrices, int[] targets)` Creates a time series dataset withot timestamps for training.
`TimeSeriesDataset(java.util.List<double[][]> valueMatrices, java.util.List<double[][]> timestampMatrices)` Creates a time series dataset with timestamps for testing.
`TimeSeriesDataset(java.util.List<double[][]> valueMatrices, java.util.List<double[][]> timestampMatrices, int[] targets)` Creates a time series dataset with timestamps for training.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`add(double[][] valueMatrix)` Add a time series variable without timestamps to the dataset.
`void`	`add(double[][] valueMatrix, double[][] timestampMatrix)` Add a time series variable with timestamps to the dataset.
`int`	`getNumberOfInstances()` Returns the number of instances contained in the dataset.
`int`	`getNumberOfVariables()` Returns the number of variables, i.e. the number of value matrices contained in the dataset.
`int[]`	`getTargets()` Getter for the target values.
`java.util.List<double[][]>`	`getTimestampMatrices()` Getter for `timestampMatrices`.
`double[][]`	`getTimestamps(int index)` Getter for the timestamp matrix at a specific index.
`double[][]`	`getTimestampsOrNull(int index)` Getter for the timestamp matrix at a specific index.
`java.util.List<double[][]>`	`getValueMatrices()` Getter for `valueMatrices`.
`double[][]`	`getValues(int index)` Getter for the value matrix at a specific index.
`double[][]`	`getValuesOrNull(int index)` Getter for the value matrix at a specific index.
`boolean`	`isEmpty()` States whether the dataset is empty, i.e. contains no value matrices, or not.
`boolean`	`isMultivariate()` States whether the dataset is a univariate dataset, i.e. contains more than one value matrix, or not.
`boolean`	`isTest()` States whether the dataset is a test dataset, i.e. contains no valid targets after initialization, or not.
`boolean`	`isTrain()` States whether the dataset is a training dataset, i.e. contains valid targets after initialization, or not.
`boolean`	`isUnivariate()` States whether the dataset is a univariate dataset, i.e. contains exactly one value matrix, or not.
`void`	`remove(int index)` Removes the time series variable at a given index.
`void`	`replace(int index, double[][] valueMatrix, double[][] timestampMatrix)` Replaces the time series variable at a given index with a new one.
`void`	`setTargets(int[] targets)` Setter for `targets`.
`void`	`setTimestampMatrices(java.util.List<double[][]> timestampMatrices)` Setter for `timestampMatrices`.
`void`	`setValueMatrices(java.util.List<double[][]> valueMatrices)` Setter for `valueMatrices`.

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

- Constructor Detail
  - TimeSeriesDataset
```
public TimeSeriesDataset(java.util.List<double[][]> valueMatrices,
                         java.util.List<double[][]> timestampMatrices,
                         int[] targets)
```
    Creates a time series dataset with timestamps for training. Let `n` be the number of instances.
    
    Parameters:
    
    valueMatrices - Values for the time series variables. List of 2D-Arrays with shape `[n, ?]`.
    
    timestampMatrices - Timestamps for the time series variables. List of 2D-Arrays with shape `[n, ?]`. Or `null` if no timestamps exist for the corresponding time series variable. The shape of the `i`th index must be equal to the shape of the `i`th element of `valueMatrices`.
    
    targets - Target values for the instances.
  - TimeSeriesDataset
```
public TimeSeriesDataset(java.util.List<double[][]> valueMatrices,
                         java.util.List<double[][]> timestampMatrices)
```
    Creates a time series dataset with timestamps for testing. Let `n` be the number of instances.
    
    Parameters:
    
    valueMatrices - Values for the time series variables. List of 2D-Arrays with shape `[n, ?]`.
    
    timestampMatrices - Timestamps for the time series variables. List of 2D-Arrays with shape `[n, ?]`. Or `null` if no timestamps exist for the corresponding time series variable. The shape of the `i`th index must be equal to the shape of the `i`th element of `valueMatrices`.
    
    targets - Target values for the instances.
  - TimeSeriesDataset
```
public TimeSeriesDataset(java.util.List<double[][]> valueMatrices,
                         int[] targets)
```
    Creates a time series dataset withot timestamps for training. Let `n` be the number of instances.
    
    Parameters:
    
    valueMatrices - Values for the time series variables. List of 2D-Arrays with shape `[n, ?]`.
    
    timestampMatrices - Timestamps for the time series variables. List of 2D-Arrays with shape `[n, ?]`. Or `null` if no timestamps exist for the corresponding time series variable. The shape of the `i`th index must be equal to the shape of the `i`th element of `valueMatrices`.
    
    targets - Target values for the instances.
  - TimeSeriesDataset
```
public TimeSeriesDataset(java.util.List<double[][]> valueMatrices)
```
    Creates a time series dataset without timestamps for testing. Let `n` be the number of instances.
    
    Parameters:
    
    valueMatrices - Values for the time series variables. List of 2D-Arrays with shape `[n, ?]`.
    
    targets - Target values for the instances.
- Method Detail
  - add
```
public void add(double[][] valueMatrix,
                double[][] timestampMatrix)
```
    Add a time series variable with timestamps to the dataset.
    
    Parameters:
    
    valueMatrix - Values for the time series variable to add. 2D-Arrays with shape `[n, ?]` where `n` is the number of instances of the dataset.
    
    timestampMatrix - Timestamps for the time series variable to add. 2D-Arrays with shape `[n, ?]` where `n` is the number of instances of the dataset. Or `null` if no timestamp exists for this time series variable.
  - add
```
public void add(double[][] valueMatrix)
```
    Add a time series variable without timestamps to the dataset.
    
    Parameters:
    
    valueMatrix - Values for the time series variable to add. 2D-Arrays with shape `[n, ?]` where `n` is the number of instances of the dataset.
  - remove
```
public void remove(int index)
```
    Removes the time series variable at a given index.
    
    Parameters:
    
    index -
    
    Throws:
    
    java.lang.IndexOutOfBoundsException
  - replace
```
public void replace(int index,
                    double[][] valueMatrix,
                    double[][] timestampMatrix)
```
    Replaces the time series variable at a given index with a new one.
    
    Parameters:
    
    index - Index of the time series varialbe to replace.
    
    valueMatrix - Values for the time series variable to add. 2D-Arrays with shape `[n, ?]` where `n` is the number of instances of the dataset.
    
    timestampMatrix - Timestamps for the time series variable to add. 2D-Arrays with shape `[n, ?]` where `n` is the number of instances of the dataset. Or `null` if no timestamp exists for this time series variable.
    
    Throws:
    
    java.lang.IndexOutOfBoundsException - Thrown if `numberOfInstances <= index`.
  - getTargets
```
public int[] getTargets()
```
    Getter for the target values.
    
    Returns:
    
    The targets.
  - getNumberOfVariables
```
public int getNumberOfVariables()
```
    Returns the number of variables, i.e. the number of value matrices contained in the dataset.
    
    Returns:
    
    The number of variables.
  - getNumberOfInstances
```
public int getNumberOfInstances()
```
    Returns the number of instances contained in the dataset.
    
    Returns:
    
    The number of instances contained in the dataset.
  - getValues
```
public double[][] getValues(int index)
```
    Getter for the value matrix at a specific index. Throws an exception if no timestamp matrix exists at this index.
    
    Parameters:
    
    index - The index of the value matrix.
    
    Returns:
    
    The value matrix at index index.
    
    Throws:
    
    java.lang.IndexOutOfBoundsException - If there is no value matrix at index index.
  - getTimestamps
```
public double[][] getTimestamps(int index)
```
    Getter for the timestamp matrix at a specific index.
    
    Parameters:
    
    index - The index of the timestamp matrix.
    
    Returns:
    
    The timestamp matrix at index index.
    
    Throws:
    
    java.lang.IndexOutOfBoundsException - If there is no value timestamp at index index.
  - getValuesOrNull
```
public double[][] getValuesOrNull(int index)
```
    Getter for the value matrix at a specific index.
    
    Parameters:
    
    index - The index of the timestamp matrix.
    
    Returns:
    
    The value matrix at index index. Or null, if no value matrix exists at index index.
  - getTimestampsOrNull
```
public double[][] getTimestampsOrNull(int index)
```
    Getter for the timestamp matrix at a specific index.
    
    Parameters:
    
    index - The index of the timestamp matrix.
    
    Returns:
    
    The timestamp matrix at index index. Or null, if no timestamp matrix exists at index index.
  - isEmpty
```
public boolean isEmpty()
```
    States whether the dataset is empty, i.e. contains no value matrices, or not.
    
    Returns:
    
    True, if the dataset is empty. False, otherwise.
  - isUnivariate
```
public boolean isUnivariate()
```
    States whether the dataset is a univariate dataset, i.e. contains exactly one value matrix, or not.
    
    Returns:
    
    True, if the dataset is univariate. False, otherwise.
  - isMultivariate
```
public boolean isMultivariate()
```
    States whether the dataset is a univariate dataset, i.e. contains more than one value matrix, or not.
    
    Returns:
    
    True, if the dataset is multivariate. False, otherwise.
  - isTrain
```
public boolean isTrain()
```
    States whether the dataset is a training dataset, i.e. contains valid targets after initialization, or not.
    
    Returns:
    
    True, if the dataset is a training dataset. False, otherwise.
  - isTest
```
public boolean isTest()
```
    States whether the dataset is a test dataset, i.e. contains no valid targets after initialization, or not.
    
    Returns:
    
    True, if the dataset is a test dataset. False, otherwise.
  - getValueMatrices
```
public java.util.List<double[][]> getValueMatrices()
```
    Getter for valueMatrices.
    
    Returns:
    
    the valueMatrices
  - getTimestampMatrices
```
public java.util.List<double[][]> getTimestampMatrices()
```
    Getter for timestampMatrices.
    
    Returns:
    
    the timestampMatrices
  - setValueMatrices
```
public void setValueMatrices(java.util.List<double[][]> valueMatrices)
```
    Setter for valueMatrices.
    
    Parameters:
    
    valueMatrices - the valueMatrices to set
  - setTimestampMatrices
```
public void setTimestampMatrices(java.util.List<double[][]> timestampMatrices)
```
    Setter for timestampMatrices.
    
    Parameters:
    
    timestampMatrices - the timestampMatrices to set
  - setTargets
```
public void setTargets(int[] targets)
```
    Setter for targets.
    
    Parameters:
    
    targets - the targets to set

Class TimeSeriesDataset

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

TimeSeriesDataset

TimeSeriesDataset

TimeSeriesDataset

TimeSeriesDataset

Method Detail

add

add

remove

replace

getTargets

getNumberOfVariables

getNumberOfInstances

getValues

getTimestamps

getValuesOrNull

getTimestampsOrNull

isEmpty

isUnivariate

isMultivariate

isTrain

isTest

getValueMatrices

getTimestampMatrices

setValueMatrices

setTimestampMatrices

setTargets