ai.libs.jaicore.ml.tsc.util

Class SimplifiedTimeSeriesLoader

java.lang.Object

ai.libs.jaicore.ml.tsc.util.SimplifiedTimeSeriesLoader

public class SimplifiedTimeSeriesLoader
extends java.lang.Object

Time series loader class which provides functionality to read datasets from files storing into simplified, more efficient time series datasets.

Field Summary

Fields

Modifier and Type	Field and Description
static java.lang.String	DEFAULT_CHARSET Default charset used when extracting from files.

Method Summary

Modifier and Type	Method and Description
static int	countFileLines(java.io.File file) Counts the lines of the given File object in a very efficient way (thanks to https://stackoverflow.com/a/453067).
static ai.libs.jaicore.basic.sets.Pair<TimeSeriesDataset,ClassMapper>	loadArff(java.io.File arffFile) Loads a univariate time series dataset from the given arff file.
static ai.libs.jaicore.basic.sets.Pair<TimeSeriesDataset,ClassMapper>	loadArffs(java.io.File... arffFiles) Loads a multivariate time series dataset from multiple arff files (each for one series).

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_CHARSET

public static final java.lang.String DEFAULT_CHARSET

Default charset used when extracting from files.

See Also:

Constant Field Values

Method Detail

loadArff

public static ai.libs.jaicore.basic.sets.Pair<TimeSeriesDataset,ClassMapper> loadArff(java.io.File arffFile)
                                                                               throws TimeSeriesLoadingException

Loads a univariate time series dataset from the given arff file. Assumes the class attribute to be the last among the declared attributes in the file.

Parameters:

arffFile - The arff file which is read

Returns:

Returns a pair consisting of an univariate TimeSeriesDataset object and a list of String objects containing the class values.

Throws:

TimeSeriesLoadingException - Throws an exception when the TimeSeriesDataset could not be created from the given file.

loadArffs

public static ai.libs.jaicore.basic.sets.Pair<TimeSeriesDataset,ClassMapper> loadArffs(java.io.File... arffFiles)
                                                                                throws TimeSeriesLoadingException

Loads a multivariate time series dataset from multiple arff files (each for one series). The arff files must share the same targets among all series. Assumes the class attribute to be the last among the declared attributes in the file.

Parameters:

arffFiles - A sequence of arff files each containing one time series per instance

Returns:

Returns a multivariate TimeSeriesDataset object

Throws:

TimeSeriesLoadingException - Throws an exception when the TimeSeriesDataset could not be created from the given files.

countFileLines

public static int countFileLines(java.io.File file)
                          throws java.io.IOException

Counts the lines of the given File object in a very efficient way (thanks to https://stackoverflow.com/a/453067).

Parameters:

filename - File which lines of code are counted

Returns:

Returns the number of file lines

Throws:

java.io.IOException - Throws exception when the given file could not be read