public class SparseInstance extends Instance
Constructor and Description |
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SparseInstance(double weight,
double[] attValues)
Constructor that generates a sparse instance from the given
parameters.
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SparseInstance(double weight,
double[] attValues,
int[] indices,
int maxNumValues)
Constructor that inititalizes instance variable with given
values.
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SparseInstance(Instance instance)
Constructor that generates a sparse instance from the given
instance.
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SparseInstance(int numAttributes)
Constructor of an instance that sets weight to one, all values to
be missing, and the reference to the dataset to null.
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SparseInstance(SparseInstance instance)
Constructor that copies the info from the given instance.
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Modifier and Type | Method and Description |
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Attribute |
attributeSparse(int indexOfIndex)
Returns the attribute associated with the internal index.
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java.lang.Object |
copy()
Produces a shallow copy of this instance.
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java.lang.String |
getRevision()
Returns the revision string.
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int |
index(int position)
Returns the index of the attribute stored at the given position.
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boolean |
isMissing(int attIndex)
Tests if a specific value is "missing".
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int |
locateIndex(int index)
Locates the greatest index that is not greater than the
given index.
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static void |
main(java.lang.String[] options)
Main method for testing this class.
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Instance |
mergeInstance(Instance inst)
Merges this instance with the given instance and returns
the result.
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int |
numAttributes()
Returns the number of attributes.
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int |
numValues()
Returns the number of values in the sparse vector.
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void |
replaceMissingValues(double[] array)
Replaces all missing values in the instance with the
values contained in the given array.
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void |
setValue(int attIndex,
double value)
Sets a specific value in the instance to the given value
(internal floating-point format).
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void |
setValueSparse(int indexOfIndex,
double value)
Sets a specific value in the instance to the given value
(internal floating-point format).
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double[] |
toDoubleArray()
Returns the values of each attribute as an array of doubles.
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java.lang.String |
toString()
Returns the description of one instance in sparse format.
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double |
value(int attIndex)
Returns an instance's attribute value in internal format.
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attribute, classAttribute, classIndex, classIsMissing, classValue, dataset, deleteAttributeAt, enumerateAttributes, equalHeaders, hasMissingValue, insertAttributeAt, isMissing, isMissingSparse, isMissingValue, missingValue, numClasses, relationalValue, relationalValue, setClassMissing, setClassValue, setClassValue, setDataset, setMissing, setMissing, setValue, setValue, setValue, setWeight, stringValue, stringValue, toString, toString, value, valueSparse, weight
public SparseInstance(Instance instance)
instance
- the instance from which the attribute values
and the weight are to be copiedpublic SparseInstance(SparseInstance instance)
instance
- the instance from which the attribute
info is to be copiedpublic SparseInstance(double weight, double[] attValues)
weight
- the instance's weightattValues
- a vector of attribute valuespublic SparseInstance(double weight, double[] attValues, int[] indices, int maxNumValues)
weight
- the instance's weightattValues
- a vector of attribute values (just the ones to be stored)indices
- the indices of the given values in the full vector (need to
be sorted in ascending order)maxNumValues
- the maximium number of values that can be storedpublic SparseInstance(int numAttributes)
numAttributes
- the size of the instancepublic Attribute attributeSparse(int indexOfIndex)
attributeSparse
in class Instance
indexOfIndex
- the index of the attribute's indexUnassignedDatasetException
- if instance doesn't have access to a
datasetpublic java.lang.Object copy()
new SparseInstance(instance)
public int index(int position)
public boolean isMissing(int attIndex)
public int locateIndex(int index)
public Instance mergeInstance(Instance inst)
mergeInstance
in class Instance
inst
- the instance to be merged with this onepublic int numAttributes()
numAttributes
in class Instance
public int numValues()
public void replaceMissingValues(double[] array)
replaceMissingValues
in class Instance
array
- containing the means and modesjava.lang.IllegalArgumentException
- if numbers of attributes are unequalpublic void setValue(int attIndex, double value)
public void setValueSparse(int indexOfIndex, double value)
setValueSparse
in class Instance
indexOfIndex
- the index of the attribute's indexvalue
- the new attribute value (If the corresponding
attribute is nominal (or a string) then this is the new value's
index as a double).public double[] toDoubleArray()
toDoubleArray
in class Instance
public java.lang.String toString()
public double value(int attIndex)
public static void main(java.lang.String[] options)
public java.lang.String getRevision()
getRevision
in interface RevisionHandler
getRevision
in class Instance