Package ai.libs.jaicore.ml.tsc.util

Class 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 Description
      static java.lang.String DEFAULT_CHARSET
      Default charset used when extracting from files.

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method 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