Package adams.ml.data

Class DatasetUtils

java.lang.Object

adams.data.spreadsheet.SpreadSheetUtils

adams.data.spreadsheet.SpreadSheetHelper

adams.ml.data.DatasetUtils

public class DatasetUtils
extends SpreadSheetHelper

Helper methods for Dataset objects.

Author:

FracPete (fracpete at waikato dot ac dot nz)

Field Summary

Fields inherited from class adams.data.spreadsheet.SpreadSheetUtils

PREFIX_COL

Constructor Summary

Constructors

Constructor	Description
DatasetUtils()

Method Summary

Modifier and Type	Method	Description
static int[]	getNumericColumns(Dataset data)	Determines the numeric columns in a dataset.
static SpreadSheet	matrixAlgoToSpreadSheet(com.github.waikatodatamining.matrix.core.Matrix data, String colPrefix)	Returns the matrix as spreadsheet.
static List<double[]>	numericToArrays(Dataset data)	Turns all the numeric columns into a list of double arrays.
static List<double[]>	numericToArrays(Dataset data, int[] cols)	Turns the specified numeric columns into a list of double arrays.
static Jama.Matrix	numericToJama(Dataset data)	Turns all the numeric columns into a Jama Matrix.
static Jama.Matrix	numericToJama(Dataset data, int[] cols)	Turns the specified numeric columns into a Jama Matrix.
static com.github.waikatodatamining.matrix.core.Matrix	numericToMatrixAlgo(Dataset data)	Turns all the numeric columns into a Jama Matrix.
static com.github.waikatodatamining.matrix.core.Matrix	numericToMatrixAlgo(Dataset data, int[] cols)	Turns the specified numeric columns into a Jama Matrix.

Methods inherited from class adams.data.spreadsheet.SpreadSheetHelper

append, compare, compareCells, convertToNumeric, mapToSpreadSheet

Methods inherited from class adams.data.spreadsheet.SpreadSheetUtils

createHeader, getCellLocation, getCellPosition, getColumn, getColumn, getColumnPosition, getMinMax, getMinMax, getNumericColumn, getNumericRow, getNumericRow, split, split, split, uniqueValues

Methods inherited from class java.lang.Object

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

Constructor Detail

DatasetUtils

public DatasetUtils()

Method Detail

getNumericColumns

public static int[] getNumericColumns(Dataset data)

Determines the numeric columns in a dataset.

Parameters:

data - the dataset to inspect

Returns:

the indices of the numeric columns

numericToJama

public static Jama.Matrix numericToJama(Dataset data)

Turns all the numeric columns into a Jama Matrix.

Parameters:

data - the data to convert

Returns:

the generated matrix

numericToJama

public static Jama.Matrix numericToJama(Dataset data,
                                        int[] cols)

Turns the specified numeric columns into a Jama Matrix.

Parameters:

data - the data to convert

cols - the numeric columns to use

Returns:

the generated matrix

numericToMatrixAlgo

public static com.github.waikatodatamining.matrix.core.Matrix numericToMatrixAlgo(Dataset data)

Turns all the numeric columns into a Jama Matrix.

Parameters:

data - the data to convert

Returns:

the generated matrix

numericToMatrixAlgo

public static com.github.waikatodatamining.matrix.core.Matrix numericToMatrixAlgo(Dataset data,
                                                                                  int[] cols)

Turns the specified numeric columns into a Jama Matrix.

Parameters:

data - the data to convert

cols - the numeric columns to use

Returns:

the generated matrix

numericToArrays

public static List<double[]> numericToArrays(Dataset data)

Turns all the numeric columns into a list of double arrays.

Parameters:

data - the data to convert

Returns:

the generated arrays

numericToArrays

public static List<double[]> numericToArrays(Dataset data,
                                             int[] cols)

Turns the specified numeric columns into a list of double arrays.

Parameters:

data - the data to convert

cols - the numeric columns to use

Returns:

the generated arrays

matrixAlgoToSpreadSheet

public static SpreadSheet matrixAlgoToSpreadSheet(com.github.waikatodatamining.matrix.core.Matrix data,
                                                  String colPrefix)

Returns the matrix as spreadsheet.

Parameters:

data - the matrix to convert

colPrefix - the prefix for the columns

Returns:

the generated spreadsheet