Package adams.data.instances

Class ArffUtils

java.lang.Object

adams.data.weka.ArffUtils

adams.data.instances.ArffUtils

public class ArffUtils
extends adams.data.weka.ArffUtils

A helper class for turning spectrum data into ARFF files and vice versa.

Author:

fracpete (fracpete at waikato dot ac dot nz)

Field Summary

Fields

Modifier and Type	Field	Description
static String	PREFIX_AMPLITUDE
static String	PREFIX_WAVE_NUMBER
static String	SAMPLE_ID

Fields inherited from class adams.data.weka.ArffUtils

PREFIX_ADDITIONALFIELDS, PREFIX_NOTE

Constructor Summary

Constructors

Constructor	Description
ArffUtils()

Method Summary

Modifier and Type	Method	Description
static int[]	amplitudes(weka.core.Instances data, boolean oneBased)	Returns the indices of the amplitudes in the dataset.
static String	getAmplitudeName(float waveno)	Returns the name of an attribute for an amplitude.
static String	getAmplitudeName(int index)	Returns the name of an attribute for an amplitude.
static String	getAmplitudeName(String prefix, float waveno)	Returns the name of an attribute for an amplitude.
static String	getAmplitudeName(String prefix, int index)	Returns the name of an attribute for an amplitude.
static weka.filters.unsupervised.attribute.Remove	getRemoveFilter(weka.core.Instances data)	Initializes the Remove filter for removing all IDs (and string attributes) from the dataset.
static String	getSampleIDName()	Returns the name of the attribute containing the sample ID of the spectrum.
static String	getWaveNumberName(float waveno)	Returns the name of an attribute for a wave number.
static String	getWaveNumberName(int index)	Returns the name of an attribute for a wave number.
static String	getWaveNumberName(String prefix, float waveno)	Returns the name of an attribute for a wave number.
static String	getWaveNumberName(String prefix, int index)	Returns the name of an attribute for a wave number.
static int[]	toRemove(weka.core.Instances data, boolean oneBased)	Returns the indices of the attributes to remove, i.e., ID attributes and string attributes.

Methods inherited from class adams.data.weka.ArffUtils

getAdditionalFieldName, getDBIDName, getFieldName, getIDName, getNoteName

Methods inherited from class java.lang.Object

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

Field Detail

SAMPLE_ID

public static final String SAMPLE_ID

See Also:

Constant Field Values

PREFIX_WAVE_NUMBER

public static final String PREFIX_WAVE_NUMBER

See Also:

Constant Field Values

PREFIX_AMPLITUDE

public static final String PREFIX_AMPLITUDE

See Also:

Constant Field Values

Constructor Detail

ArffUtils

public ArffUtils()

Method Detail

getSampleIDName

public static String getSampleIDName()

Returns the name of the attribute containing the sample ID of the spectrum.

Returns:

the attribute name

getWaveNumberName

public static String getWaveNumberName(int index)

Returns the name of an attribute for a wave number. Gets prefixed with "wave-number-".

Parameters:

index - the 0-based index

Returns:

the attribute name

See Also:

PREFIX_WAVE_NUMBER

getWaveNumberName

public static String getWaveNumberName(String prefix,
                                       int index)

Returns the name of an attribute for a wave number. Gets prefixed with the specified prefix.

Parameters:

prefix - the prefix string to use

index - the 0-based index

Returns:

the attribute name

getWaveNumberName

public static String getWaveNumberName(float waveno)

Returns the name of an attribute for a wave number. Gets prefixed with "wave-number-".

Parameters:

waveno - the wave number

Returns:

the attribute name

See Also:

PREFIX_WAVE_NUMBER

getWaveNumberName

public static String getWaveNumberName(String prefix,
                                       float waveno)

Returns the name of an attribute for a wave number. Gets prefixed with the specified prefix.

Parameters:

prefix - the prefix string to use

waveno - the wave number

Returns:

the attribute name

getAmplitudeName

public static String getAmplitudeName(int index)

Returns the name of an attribute for an amplitude. Gets prefixed with "amplitude-".

Parameters:

index - the 0-based index

Returns:

the attribute name

See Also:

PREFIX_AMPLITUDE

getAmplitudeName

public static String getAmplitudeName(String prefix,
                                      int index)

Returns the name of an attribute for an amplitude. Gets prefixed with the specified prefix.

Parameters:

prefix - the prefix string to use

index - the 0-based index

Returns:

the attribute name

getAmplitudeName

public static String getAmplitudeName(float waveno)

Returns the name of an attribute for an amplitude. Gets prefixed with "amplitude-".

Parameters:

waveno - the wave number

Returns:

the attribute name

getAmplitudeName

public static String getAmplitudeName(String prefix,
                                      float waveno)

Returns the name of an attribute for an amplitude. Gets prefixed with the specified prefix.

Parameters:

prefix - the prefix string to use

waveno - the wave number

Returns:

the attribute name

amplitudes

public static int[] amplitudes(weka.core.Instances data,
                               boolean oneBased)

Returns the indices of the amplitudes in the dataset.

Parameters:

data - the dataset to analyze

oneBased - whether to return 1-based or 0-based indices

Returns:

the indices

toRemove

public static int[] toRemove(weka.core.Instances data,
                             boolean oneBased)

Returns the indices of the attributes to remove, i.e., ID attributes and string attributes. Class attribute is never listed.

Parameters:

data - the data to analyze

oneBased - whether to return 1-based or 0-based indices

Returns:

the indices to remove

getRemoveFilter

public static weka.filters.unsupervised.attribute.Remove getRemoveFilter(weka.core.Instances data)

Initializes the Remove filter for removing all IDs (and string attributes) from the dataset.

Parameters:

data - the data to use for the analysis

Returns:

the configured filter, null if no filtering required