smile.data

Class BinarySparseDataset

java.lang.Object

smile.data.Dataset<int[]>

smile.data.BinarySparseDataset

All Implemented Interfaces:

Iterable<Datum<int[]>>

public class BinarySparseDataset
extends Dataset<int[]>

Binary sparse dataset. Each item is stored as an integer array, which are the indices of nonzero elements in ascending order.

Author:

Haifeng Li

Constructor Summary

Constructors

Constructor and Description
BinarySparseDataset() Constructor.
BinarySparseDataset(int ncols) Constructor.
BinarySparseDataset(String name) Constructor.
BinarySparseDataset(String name, Attribute response) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(Datum<int[]> datum) Add a datum item into the dataset.
int	get(int i, int j) Returns the value at entry (i, j) by binary search.
int	ncols() Returns the number of columns.
SparseMatrix	toSparseMatrix() Convert into Harwell-Boeing column-compressed sparse matrix format.

Methods inherited from class smile.data.Dataset

add, add, add, add, add, get, getDescription, getName, iterator, remove, response, setDescription, setName, size, toArray, toArray, toArray, toArray, toArray

Methods inherited from class java.lang.Object

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

Constructor Detail

BinarySparseDataset

public BinarySparseDataset()

Constructor.

BinarySparseDataset

public BinarySparseDataset(String name)

Constructor.

Parameters:

name - the name of dataset.

BinarySparseDataset

public BinarySparseDataset(String name,
                   Attribute response)

Constructor.

Parameters:

name - the name of dataset.

response - the attribute type of response variable.

BinarySparseDataset

public BinarySparseDataset(int ncols)

Constructor.

Parameters:

ncols - the number of columns in the matrix.

Method Detail

ncols

public int ncols()

Returns the number of columns.

add

public void add(Datum<int[]> datum)

Add a datum item into the dataset.

Overrides:

add in class Dataset<int[]>

Parameters:

datum - a datum item. The indices of nonzero elements will be sorted into ascending order.

get

public int get(int i,
      int j)

Returns the value at entry (i, j) by binary search.

Parameters:

i - the row index.

j - the column index.

toSparseMatrix

public SparseMatrix toSparseMatrix()

Convert into Harwell-Boeing column-compressed sparse matrix format.