cern.colt.matrix.tfloat

Class FloatFactory1D

java.lang.Object

cern.colt.PersistentObject

cern.colt.matrix.tfloat.FloatFactory1D

All Implemented Interfaces:

Serializable, Cloneable

public class FloatFactory1D
extends PersistentObject

Factory for convenient construction of 1-d matrices holding float cells. Use idioms like FloatFactory1D.dense.make(1000) to construct dense matrices, FloatFactory1D.sparse.make(1000) to construct sparse matrices. If the factory is used frequently it might be useful to streamline the notation. For example by aliasing:

FloatFactory1D F = FloatFactory1D.dense; F.make(1000); F.descending(10); F.random(3); ...

Version:

1.0, 09/24/99

Author:

wolfgang.hoschek@cern.ch

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static FloatFactory1D	dense A factory producing dense matrices.
static FloatFactory1D	sparse A factory producing sparse matrices.

Method Summary

Methods

Modifier and Type	Method and Description
FloatMatrix1D	append(FloatMatrix1D A, FloatMatrix1D B) C = A||B; Constructs a new matrix which is the concatenation of two other matrices.
FloatMatrix1D	ascending(int size) Constructs a matrix with cells having ascending values.
FloatMatrix1D	descending(int size) Constructs a matrix with cells having descending values.
FloatMatrix1D	make(AbstractFloatList values) Constructs a matrix from the values of the given list.
FloatMatrix1D	make(float[] values) Constructs a matrix with the given cell values.
FloatMatrix1D	make(FloatMatrix1D[] parts) Constructs a matrix which is the concatenation of all given parts.
FloatMatrix1D	make(int size) Constructs a matrix with the given shape, each cell initialized with zero.
FloatMatrix1D	make(int size, float initialValue) Constructs a matrix with the given shape, each cell initialized with the given value.
FloatMatrix1D	random(int size) Constructs a matrix with uniformly distributed values in (0,1) (exclusive).
FloatMatrix1D	repeat(FloatMatrix1D A, int repeat) C = A||A||..||A; Constructs a new matrix which is concatenated repeat times.
FloatMatrix1D	sample(int size, float value, float nonZeroFraction) Constructs a randomly sampled matrix with the given shape.
FloatArrayList	toList(FloatMatrix1D values) Constructs a list from the given matrix.

Methods inherited from class cern.colt.PersistentObject

clone

Methods inherited from class java.lang.Object

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

Field Detail

dense

public static final FloatFactory1D dense

A factory producing dense matrices.

sparse

public static final FloatFactory1D sparse

A factory producing sparse matrices.

Method Detail

append

public FloatMatrix1D append(FloatMatrix1D A,
                   FloatMatrix1D B)

C = A||B; Constructs a new matrix which is the concatenation of two other matrices. Example: 0 1 append 3 4 --> 0 1 3 4.

ascending

public FloatMatrix1D ascending(int size)

Constructs a matrix with cells having ascending values. For debugging purposes. Example: 0 1 2

descending

public FloatMatrix1D descending(int size)

Constructs a matrix with cells having descending values. For debugging purposes. Example: 2 1 0

make

public FloatMatrix1D make(AbstractFloatList values)

Constructs a matrix from the values of the given list. The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.

Parameters:

values - The values to be filled into the new matrix.

Returns:

a new matrix.

make

public FloatMatrix1D make(float[] values)

Constructs a matrix with the given cell values. The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.

Parameters:

values - The values to be filled into the new matrix.

make

public FloatMatrix1D make(FloatMatrix1D[] parts)

Constructs a matrix which is the concatenation of all given parts. Cells are copied.

make

public FloatMatrix1D make(int size)

Constructs a matrix with the given shape, each cell initialized with zero.

make

public FloatMatrix1D make(int size,
                 float initialValue)

Constructs a matrix with the given shape, each cell initialized with the given value.

random

public FloatMatrix1D random(int size)

Constructs a matrix with uniformly distributed values in (0,1) (exclusive).

repeat

public FloatMatrix1D repeat(FloatMatrix1D A,
                   int repeat)

C = A||A||..||A; Constructs a new matrix which is concatenated repeat times. Example:

         0 1
         repeat(3) -->
         0 1 0 1 0 1
 
 

sample

public FloatMatrix1D sample(int size,
                   float value,
                   float nonZeroFraction)

Constructs a randomly sampled matrix with the given shape. Randomly picks exactly Math.round(size*nonZeroFraction) cells and initializes them to value, all the rest will be initialized to zero. Note that this is not the same as setting each cell with probability nonZeroFraction to value.

Throws:

IllegalArgumentException - if nonZeroFraction < 0 || nonZeroFraction > 1.

See Also:

FloatRandomSampler

toList

public FloatArrayList toList(FloatMatrix1D values)

Constructs a list from the given matrix. The values are copied. So subsequent changes in values are not reflected in the list, and vice-versa.

Parameters:

values - The values to be filled into the new list.

Returns:

a new list.