cern.colt.matrix.tobject

Class ObjectMatrix3D

java.lang.Object

cern.colt.PersistentObject

cern.colt.matrix.AbstractMatrix

cern.colt.matrix.AbstractMatrix3D

cern.colt.matrix.tobject.ObjectMatrix3D

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

DenseObjectMatrix3D, SparseObjectMatrix3D, WrapperObjectMatrix3D

public abstract class ObjectMatrix3D
extends AbstractMatrix3D

Abstract base class for 3-d matrices holding Object elements. First see the package summary and javadoc tree view to get the broad picture.

A matrix has a number of slices, rows and columns, which are assigned upon instance construction - The matrix's size is then slices()*rows()*columns(). Elements are accessed via [slice,row,column] coordinates. Legal coordinates range from [0,0,0] to [slices()-1,rows()-1,columns()-1]. Any attempt to access an element at a coordinate slice<0 || slice>=slices() || row<0 || row>=rows() || column<0 || column>=column() will throw an IndexOutOfBoundsException.

Note that this implementation is not synchronized.

Version:

1.0, 09/24/99

Author:

wolfgang.hoschek@cern.ch

See Also:

Serialized Form

Method Summary

Methods

Modifier and Type	Method and Description
Object	aggregate(ObjectMatrix3D other, ObjectObjectFunction aggr, ObjectObjectFunction f) Applies a function to each corresponding cell of two matrices and aggregates the results.
Object	aggregate(ObjectObjectFunction aggr, ObjectFunction f) Applies a function to each cell and aggregates the results.
Object	aggregate(ObjectObjectFunction aggr, ObjectFunction f, IntArrayList sliceList, IntArrayList rowList, IntArrayList columnList) Applies a function to all cells with a given indexes and aggregates the results.
Object	aggregate(ObjectObjectFunction aggr, ObjectFunction f, ObjectProcedure cond) Applies a function to each cell that satisfies a condition and aggregates the results.
ObjectMatrix3D	assign(Object value) Sets all cells to the state specified by value.
ObjectMatrix3D	assign(Object[] values) Sets all cells to the state specified by values.
ObjectMatrix3D	assign(Object[][][] values) Sets all cells to the state specified by values.
ObjectMatrix3D	assign(ObjectFunction function) Assigns the result of a function to each cell; x[slice,row,col] = function(x[slice,row,col]).
ObjectMatrix3D	assign(ObjectMatrix3D other) Replaces all cell values of the receiver with the values of another matrix.
ObjectMatrix3D	assign(ObjectMatrix3D y, ObjectObjectFunction function) Assigns the result of a function to each cell; x[row,col] = function(x[row,col],y[row,col]).
ObjectMatrix3D	assign(ObjectMatrix3D y, ObjectObjectFunction function, IntArrayList sliceList, IntArrayList rowList, IntArrayList columnList) Assigns the result of a function to all cells with a given indexes
ObjectMatrix3D	assign(ObjectProcedure cond, Object value) Assigns a value to all cells that satisfy a condition.
ObjectMatrix3D	assign(ObjectProcedure cond, ObjectFunction f) Assigns the result of a function to all cells that satisfy a condition.
int	cardinality() Returns the number of cells having non-zero values; ignores tolerance.
ObjectMatrix3D	copy() Constructs and returns a deep copy of the receiver.
abstract Object	elements() Returns the elements of this matrix.
boolean	equals(Object otherObj) Compares the specified Object with the receiver for equality.
boolean	equals(Object otherObj, boolean testForEquality) Compares the specified Object with the receiver for equality.
Object	get(int slice, int row, int column) Returns the matrix cell value at coordinate [slice,row,column].
void	getNonZeros(IntArrayList sliceList, IntArrayList rowList, IntArrayList columnList, ObjectArrayList valueList) Fills the coordinates and values of cells having non-zero values into the specified lists.
abstract Object	getQuick(int slice, int row, int column) Returns the matrix cell value at coordinate [slice,row,column].
ObjectMatrix3D	like() Construct and returns a new empty matrix of the same dynamic type as the receiver, having the same number of slices, rows and columns.
abstract ObjectMatrix3D	like(int slices, int rows, int columns) Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of slices, rows and columns.
abstract ObjectMatrix2D	like2D(int rows, int columns) Construct and returns a new 2-d matrix of the corresponding dynamic type, sharing the same cells.
void	set(int slice, int row, int column, Object value) Sets the matrix cell at coordinate [slice,row,column] to the specified value.
abstract void	setQuick(int slice, int row, int column, Object value) Sets the matrix cell at coordinate [slice,row,column] to the specified value.
Object[][][]	toArray() Constructs and returns a 2-dimensional array containing the cell values.
String	toString() Returns a string representation using default formatting.
abstract ObjectMatrix1D	vectorize() Returns a vector obtained by stacking the columns of the matrix on top of one another.
ObjectMatrix2D	viewColumn(int column) Constructs and returns a new 2-dimensional slice view representing the slices and rows of the given column.
ObjectMatrix3D	viewColumnFlip() Constructs and returns a new flip view along the column axis.
ObjectMatrix3D	viewDice(int axis0, int axis1, int axis2) Constructs and returns a new dice view; Swaps dimensions (axes); Example: 3 x 4 x 5 matrix --> 4 x 3 x 5 matrix.
ObjectMatrix3D	viewPart(int slice, int row, int column, int depth, int height, int width) Constructs and returns a new sub-range view that is a depth x height x width sub matrix starting at [slice,row,column]; Equivalent to view().part(slice,row,column,depth,height,width); Provided for convenience only.
ObjectMatrix2D	viewRow(int row) Constructs and returns a new 2-dimensional slice view representing the slices and columns of the given row.
ObjectMatrix3D	viewRowFlip() Constructs and returns a new flip view along the row axis.
ObjectMatrix3D	viewSelection(int[] sliceIndexes, int[] rowIndexes, int[] columnIndexes) Constructs and returns a new selection view that is a matrix holding the indicated cells.
ObjectMatrix3D	viewSelection(ObjectMatrix2DProcedure condition) Constructs and returns a new selection view that is a matrix holding all slices matching the given condition.
ObjectMatrix2D	viewSlice(int slice) Constructs and returns a new 2-dimensional slice view representing the rows and columns of the given slice.
ObjectMatrix3D	viewSliceFlip() Constructs and returns a new flip view along the slice axis.
ObjectMatrix3D	viewSorted(int row, int column) Sorts the matrix slices into ascending order, according to the natural ordering of the matrix values in the given [row,column] position.
ObjectMatrix3D	viewStrides(int sliceStride, int rowStride, int columnStride) Constructs and returns a new stride view which is a sub matrix consisting of every i-th cell.

Methods inherited from class cern.colt.matrix.AbstractMatrix3D

checkShape, checkShape, columns, columnStride, index, rows, rowStride, size, slices, sliceStride, toStringShort

Methods inherited from class cern.colt.matrix.AbstractMatrix

ensureCapacity, isView, trimToSize

Methods inherited from class cern.colt.PersistentObject

clone

Methods inherited from class java.lang.Object

getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

aggregate

public Object aggregate(ObjectObjectFunction aggr,
               ObjectFunction f)

Applies a function to each cell and aggregates the results. Returns a value v such that v==a(size()) where a(i) == aggr( a(i-1), f(get(slice,row,column)) ) and terminators are a(1) == f(get(0,0,0)), a(0)==null.

Example:

         cern.jet.math.Functions F = cern.jet.math.Functions.functions;
         2 x 2 x 2 matrix
         0 1
         2 3
 
         4 5
         6 7
 
         // Sum( x[slice,row,col]*x[slice,row,col] ) 
         matrix.aggregate(F.plus,F.square);
         --> 140
 
 

For further examples, see the package doc.

Parameters:

aggr - an aggregation function taking as first argument the current aggregation and as second argument the transformed current cell value.

f - a function transforming the current cell value.

Returns:

the aggregated measure.

See Also:

DoubleFunctions

aggregate

public Object aggregate(ObjectObjectFunction aggr,
               ObjectFunction f,
               ObjectProcedure cond)

Applies a function to each cell that satisfies a condition and aggregates the results.

Parameters:

aggr - an aggregation function taking as first argument the current aggregation and as second argument the transformed current cell value.

f - a function transforming the current cell value.

cond - a condition.

Returns:

the aggregated measure.

aggregate

public Object aggregate(ObjectObjectFunction aggr,
               ObjectFunction f,
               IntArrayList sliceList,
               IntArrayList rowList,
               IntArrayList columnList)

Applies a function to all cells with a given indexes and aggregates the results.

Parameters:

aggr - an aggregation function taking as first argument the current aggregation and as second argument the transformed current cell value.

f - a function transforming the current cell value.

sliceList - slice indexes.

rowList - row indexes.

columnList - column indexes.

Returns:

the aggregated measure.

aggregate

public Object aggregate(ObjectMatrix3D other,
               ObjectObjectFunction aggr,
               ObjectObjectFunction f)

Applies a function to each corresponding cell of two matrices and aggregates the results. Returns a value v such that v==a(size()) where a(i) == aggr( a(i-1), f(get(slice,row,column),other.get(slice,row,column)) ) and terminators are a(1) == f(get(0,0,0),other.get(0,0,0)), a(0)==null.

Example:

         cern.jet.math.Functions F = cern.jet.math.Functions.functions;
         x = 2 x 2 x 2 matrix
         0 1
         2 3
 
         4 5
         6 7
 
         y = 2 x 2 x 2 matrix
         0 1
         2 3
 
         4 5
         6 7
 
         // Sum( x[slice,row,col] * y[slice,row,col] ) 
         x.aggregate(y, F.plus, F.mult);
         --> 140
 
         // Sum( (x[slice,row,col] + y[slice,row,col])ˆ2 )
         x.aggregate(y, F.plus, F.chain(F.square,F.plus));
         --> 560
 
 

For further examples, see the package doc.

Parameters:

aggr - an aggregation function taking as first argument the current aggregation and as second argument the transformed current cell values.

f - a function transforming the current cell values.

Returns:

the aggregated measure.

Throws:

IllegalArgumentException - if slices() != other.slices() || rows() != other.rows() || columns() != other.columns()

See Also:

DoubleFunctions

assign

public ObjectMatrix3D assign(ObjectProcedure cond,
                    ObjectFunction f)

Assigns the result of a function to all cells that satisfy a condition.

Parameters:

cond - a condition.

f - a function object.

Returns:

this (for convenience only).

assign

public ObjectMatrix3D assign(ObjectProcedure cond,
                    Object value)

Assigns a value to all cells that satisfy a condition.

Parameters:

cond - a condition.

value - a value.

Returns:

this (for convenience only).

assign

public ObjectMatrix3D assign(Object[][][] values)

Sets all cells to the state specified by values. values is required to have the form values[slice][row][column] and have exactly the same number of slices, rows and columns as the receiver.

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 cells.

Returns:

this (for convenience only).

Throws:

IllegalArgumentException - if values.length != slices() || for any 0 <= slice < slices(): values[slice].length != rows() .

IllegalArgumentException - if for any 0 <= column < columns(): values[slice][row].length != columns() .

assign

public ObjectMatrix3D assign(Object[] values)

Sets all cells to the state specified by values. values is required to have the form values[slice*row*column].

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 cells.

Returns:

this (for convenience only).

Throws:

IllegalArgumentException - if values.length != slices()*rows()*columns()

assign

public ObjectMatrix3D assign(ObjectFunction function)

Assigns the result of a function to each cell; x[slice,row,col] = function(x[slice,row,col]).

Example:

         matrix = 1 x 2 x 2 matrix
         0.5 1.5      
         2.5 3.5
 
         // change each cell to its sine
         matrix.assign(cern.jet.math.Functions.sin);
         -->
         1 x 2 x 2 matrix
         0.479426  0.997495 
         0.598472 -0.350783
 
 

For further examples, see the package doc.

Parameters:

function - a function object taking as argument the current cell's value.

Returns:

this (for convenience only).

See Also:

DoubleFunctions

assign

public ObjectMatrix3D assign(ObjectMatrix3D other)

Replaces all cell values of the receiver with the values of another matrix. Both matrices must have the same number of slices, rows and columns. If both matrices share the same cells (as is the case if they are views derived from the same matrix) and intersect in an ambiguous way, then replaces as if using an intermediate auxiliary deep copy of other.

Parameters:

other - the source matrix to copy from (may be identical to the receiver).

Returns:

this (for convenience only).

Throws:

IllegalArgumentException - if slices() != other.slices() || rows() != other.rows() || columns() != other.columns()

assign

public ObjectMatrix3D assign(ObjectMatrix3D y,
                    ObjectObjectFunction function)

Assigns the result of a function to each cell; x[row,col] = function(x[row,col],y[row,col]).

Example:

         // assign x[row,col] = x[row,col]<sup>y[row,col]</sup>
         m1 = 1 x 2 x 2 matrix 
         0 1 
         2 3
 
         m2 = 1 x 2 x 2 matrix 
         0 2 
         4 6
 
         m1.assign(m2, cern.jet.math.Functions.pow);
         -->
         m1 == 1 x 2 x 2 matrix
         1   1 
         16 729
 
 

For further examples, see the package doc.

Parameters:

y - the secondary matrix to operate on.

function - a function object taking as first argument the current cell's value of this, and as second argument the current cell's value of y,

Returns:

this (for convenience only).

Throws:

IllegalArgumentException - if slices() != other.slices() || rows() != other.rows() || columns() != other.columns()

See Also:

DoubleFunctions

assign

public ObjectMatrix3D assign(ObjectMatrix3D y,
                    ObjectObjectFunction function,
                    IntArrayList sliceList,
                    IntArrayList rowList,
                    IntArrayList columnList)

Assigns the result of a function to all cells with a given indexes

Parameters:

y - the secondary matrix to operate on.

function - a function object taking as first argument the current cell's value of this, and as second argument the current cell's value of y, *

sliceList - slice indexes.

rowList - row indexes.

columnList - column indexes.

Returns:

this (for convenience only).

Throws:

IllegalArgumentException - if slices() != other.slices() || rows() != other.rows() || columns() != other.columns()

assign

public ObjectMatrix3D assign(Object value)

Sets all cells to the state specified by value.

Parameters:

value - the value to be filled into the cells.

Returns:

this (for convenience only).

cardinality

public int cardinality()

Returns the number of cells having non-zero values; ignores tolerance.

copy

public ObjectMatrix3D copy()

Constructs and returns a deep copy of the receiver.

Note that the returned matrix is an independent deep copy. The returned matrix is not backed by this matrix, so changes in the returned matrix are not reflected in this matrix, and vice-versa.

Returns:

a deep copy of the receiver.

elements

public abstract Object elements()

Returns the elements of this matrix.

Returns:

the elements

equals

public boolean equals(Object otherObj)

Compares the specified Object with the receiver for equality. Equivalent to equals(otherObj,true).

Overrides:

equals in class Object

Parameters:

otherObj - the Object to be compared for equality with the receiver.

Returns:

true if the specified Object is equal to the receiver.

equals

public boolean equals(Object otherObj,
             boolean testForEquality)

Compares the specified Object with the receiver for equality. Returns true if and only if the specified Object is also at least an ObjectMatrix3D, both matrices have the same size, and all corresponding pairs of cells in the two matrices are the same. In other words, two matrices are defined to be equal if they contain the same cell values in the same order. Tests elements for equality or identity as specified by testForEquality. When testing for equality, two elements e1 and e2 are equal if (e1==null ? e2==null : e1.equals(e2)).)

Parameters:

otherObj - the Object to be compared for equality with the receiver.

testForEquality - if true -> tests for equality, otherwise for identity.

Returns:

true if the specified Object is equal to the receiver.

get

public Object get(int slice,
         int row,
         int column)

Returns the matrix cell value at coordinate [slice,row,column].

Parameters:

slice - the index of the slice-coordinate.

row - the index of the row-coordinate.

column - the index of the column-coordinate.

Returns:

the value of the specified cell.

Throws:

IndexOutOfBoundsException - if slice<0 || slice>=slices() || row<0 || row>=rows() || column<0 || column>=column() .

getNonZeros

public void getNonZeros(IntArrayList sliceList,
               IntArrayList rowList,
               IntArrayList columnList,
               ObjectArrayList valueList)

Fills the coordinates and values of cells having non-zero values into the specified lists. Fills into the lists, starting at index 0. After this call returns the specified lists all have a new size, the number of non-zero values.

In general, fill order is unspecified. This implementation fill like: for (slice = 0..slices-1) for (row = 0..rows-1) for (column = 0..colums-1) do ... . However, subclasses are free to us any other order, even an order that may change over time as cell values are changed. (Of course, result lists indexes are guaranteed to correspond to the same cell). For an example, see ObjectMatrix2D.getNonZeros(IntArrayList,IntArrayList,ObjectArrayList).

Parameters:

sliceList - the list to be filled with slice indexes, can have any size.

rowList - the list to be filled with row indexes, can have any size.

columnList - the list to be filled with column indexes, can have any size.

valueList - the list to be filled with values, can have any size.

getQuick

public abstract Object getQuick(int slice,
              int row,
              int column)

Returns the matrix cell value at coordinate [slice,row,column].

Provided with invalid parameters this method may return invalid objects without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): slice<0 || slice>=slices() || row<0 || row>=rows() || column<0 || column>=column().

Parameters:

slice - the index of the slice-coordinate.

row - the index of the row-coordinate.

column - the index of the column-coordinate.

Returns:

the value at the specified coordinate.

like

public ObjectMatrix3D like()

Construct and returns a new empty matrix of the same dynamic type as the receiver, having the same number of slices, rows and columns. For example, if the receiver is an instance of type DenseObjectMatrix3D the new matrix must also be of type DenseObjectMatrix3D, if the receiver is an instance of type SparseObjectMatrix3D the new matrix must also be of type SparseObjectMatrix3D, etc. In general, the new matrix should have internal parametrization as similar as possible.

Returns:

a new empty matrix of the same dynamic type.

like

public abstract ObjectMatrix3D like(int slices,
                  int rows,
                  int columns)

Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of slices, rows and columns. For example, if the receiver is an instance of type DenseObjectMatrix3D the new matrix must also be of type DenseObjectMatrix3D, if the receiver is an instance of type SparseObjectMatrix3D the new matrix must also be of type SparseObjectMatrix3D, etc. In general, the new matrix should have internal parametrization as similar as possible.

Parameters:

slices - the number of slices the matrix shall have.

rows - the number of rows the matrix shall have.

columns - the number of columns the matrix shall have.

Returns:

a new empty matrix of the same dynamic type.

like2D

public abstract ObjectMatrix2D like2D(int rows,
                    int columns)

Construct and returns a new 2-d matrix of the corresponding dynamic type, sharing the same cells. For example, if the receiver is an instance of type DenseDoubleMatrix3D the new matrix must also be of type DenseDoubleMatrix2D, if the receiver is an instance of type SparseDoubleMatrix3D the new matrix must also be of type SparseDoubleMatrix2D, etc.

Parameters:

rows - the number of rows the matrix shall have.

columns - the number of columns the matrix shall have.

Returns:

a new matrix of the corresponding dynamic type.

set

public void set(int slice,
       int row,
       int column,
       Object value)

Sets the matrix cell at coordinate [slice,row,column] to the specified value.

Parameters:

slice - the index of the slice-coordinate.

row - the index of the row-coordinate.

column - the index of the column-coordinate.

value - the value to be filled into the specified cell.

Throws:

IndexOutOfBoundsException - if row<0 || row>=rows() || slice<0 || slice>=slices() || column<0 || column>=column() .

setQuick

public abstract void setQuick(int slice,
            int row,
            int column,
            Object value)

Sets the matrix cell at coordinate [slice,row,column] to the specified value.

Provided with invalid parameters this method may access illegal indexes without throwing any exception. You should only use this method when you are absolutely sure that the coordinate is within bounds. Precondition (unchecked): slice<0 || slice>=slices() || row<0 || row>=rows() || column<0 || column>=column().

Parameters:

slice - the index of the slice-coordinate.

row - the index of the row-coordinate.

column - the index of the column-coordinate.

value - the value to be filled into the specified cell.

toArray

public Object[][][] toArray()

Constructs and returns a 2-dimensional array containing the cell values. The returned array values has the form values[slice][row][column] and has the same number of slices, rows and columns as the receiver.

The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.

Returns:

an array filled with the values of the cells.

toString

public String toString()

Returns a string representation using default formatting.

Overrides:

toString in class Object

See Also:

ObjectFormatter

vectorize

public abstract ObjectMatrix1D vectorize()

Returns a vector obtained by stacking the columns of the matrix on top of one another.

Returns:

a vector of columns of this matrix.

viewColumn

public ObjectMatrix2D viewColumn(int column)

Constructs and returns a new 2-dimensional slice view representing the slices and rows of the given column. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

To obtain a slice view on subranges, construct a sub-ranging view ( view().part(...)), then apply this method to the sub-range view. To obtain 1-dimensional views, apply this method, then apply another slice view (methods viewColumn, viewRow) on the intermediate 2-dimensional view. To obtain 1-dimensional views on subranges, apply both steps.

Parameters:

column - the index of the column to fix.

Returns:

a new 2-dimensional slice view.

Throws:

IndexOutOfBoundsException - if column < 0 || column >= columns().

See Also:

viewSlice(int), viewRow(int)

viewColumnFlip

public ObjectMatrix3D viewColumnFlip()

Constructs and returns a new flip view along the column axis. What used to be column 0 is now column columns()-1, ..., what used to be column columns()-1 is now column 0. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Returns:

a new flip view.

See Also:

viewSliceFlip(), viewRowFlip()

viewDice

public ObjectMatrix3D viewDice(int axis0,
                      int axis1,
                      int axis2)

Constructs and returns a new dice view; Swaps dimensions (axes); Example: 3 x 4 x 5 matrix --> 4 x 3 x 5 matrix. The view has dimensions exchanged; what used to be one axis is now another, in all desired permutations. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Parameters:

axis0 - the axis that shall become axis 0 (legal values 0..2).

axis1 - the axis that shall become axis 1 (legal values 0..2).

axis2 - the axis that shall become axis 2 (legal values 0..2).

Returns:

a new dice view.

Throws:

IllegalArgumentException - if some of the parameters are equal or not in range 0..2.

viewPart

public ObjectMatrix3D viewPart(int slice,
                      int row,
                      int column,
                      int depth,
                      int height,
                      int width)

Constructs and returns a new sub-range view that is a depth x height x width sub matrix starting at [slice,row,column]; Equivalent to view().part(slice,row,column,depth,height,width); Provided for convenience only. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Parameters:

slice - The index of the slice-coordinate.

row - The index of the row-coordinate.

column - The index of the column-coordinate.

depth - The depth of the box.

height - The height of the box.

width - The width of the box.

Returns:

the new view.

Throws:

IndexOutOfBoundsException - if slice<0 || depth<0 || slice+depth>slices() || row<0 || height<0 || row+height>rows() || column<0 || width<0 || column+width>columns()

viewRow

public ObjectMatrix2D viewRow(int row)

Constructs and returns a new 2-dimensional slice view representing the slices and columns of the given row. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

To obtain a slice view on subranges, construct a sub-ranging view ( view().part(...)), then apply this method to the sub-range view. To obtain 1-dimensional views, apply this method, then apply another slice view (methods viewColumn, viewRow) on the intermediate 2-dimensional view. To obtain 1-dimensional views on subranges, apply both steps.

Parameters:

row - the index of the row to fix.

Returns:

a new 2-dimensional slice view.

Throws:

IndexOutOfBoundsException - if row < 0 || row >= row().

See Also:

viewSlice(int), viewColumn(int)

viewRowFlip

public ObjectMatrix3D viewRowFlip()

Constructs and returns a new flip view along the row axis. What used to be row 0 is now row rows()-1, ..., what used to be row rows()-1 is now row 0. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Returns:

a new flip view.

See Also:

viewSliceFlip(), viewColumnFlip()

viewSelection

public ObjectMatrix3D viewSelection(int[] sliceIndexes,
                           int[] rowIndexes,
                           int[] columnIndexes)

Constructs and returns a new selection view that is a matrix holding the indicated cells. There holds view.slices() == sliceIndexes.length, view.rows() == rowIndexes.length, view.columns() == columnIndexes.length and view.get(k,i,j) == this.get(sliceIndexes[k],rowIndexes[i],columnIndexes[j]) . Indexes can occur multiple times and can be in arbitrary order. For an example see ObjectMatrix2D.viewSelection(int[],int[]).

Note that modifying the index arguments after this call has returned has no effect on the view. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Parameters:

sliceIndexes - The slices of the cells that shall be visible in the new view. To indicate that all slices shall be visible, simply set this parameter to null.

rowIndexes - The rows of the cells that shall be visible in the new view. To indicate that all rows shall be visible, simply set this parameter to null.

columnIndexes - The columns of the cells that shall be visible in the new view. To indicate that all columns shall be visible, simply set this parameter to null.

Returns:

the new view.

Throws:

IndexOutOfBoundsException - if !(0 <= sliceIndexes[i] < slices()) for any i=0..sliceIndexes.length()-1.

IndexOutOfBoundsException - if !(0 <= rowIndexes[i] < rows()) for any i=0..rowIndexes.length()-1.

IndexOutOfBoundsException - if !(0 <= columnIndexes[i] < columns()) for any i=0..columnIndexes.length()-1.

viewSelection

public ObjectMatrix3D viewSelection(ObjectMatrix2DProcedure condition)

Constructs and returns a new selection view that is a matrix holding all slices matching the given condition. Applies the condition to each slice and takes only those where condition.apply(viewSlice(i)) yields true. To match rows or columns, use a dice view.

Example:

 // extract and view all slices which have an aggregate sum > 1000
 matrix.viewSelection(new ObjectMatrix2DProcedure() {
     public final boolean apply(ObjectMatrix2D m) {
         return m.zSum > 1000;
     }
 });
 

For further examples, see the package doc. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Parameters:

condition - The condition to be matched.

Returns:

the new view.

viewSlice

public ObjectMatrix2D viewSlice(int slice)

Constructs and returns a new 2-dimensional slice view representing the rows and columns of the given slice. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

To obtain a slice view on subranges, construct a sub-ranging view ( view().part(...)), then apply this method to the sub-range view. To obtain 1-dimensional views, apply this method, then apply another slice view (methods viewColumn, viewRow) on the intermediate 2-dimensional view. To obtain 1-dimensional views on subranges, apply both steps.

Parameters:

slice - the index of the slice to fix.

Returns:

a new 2-dimensional slice view.

Throws:

IndexOutOfBoundsException - if slice < 0 || slice >= slices().

See Also:

viewRow(int), viewColumn(int)

viewSliceFlip

public ObjectMatrix3D viewSliceFlip()

Constructs and returns a new flip view along the slice axis. What used to be slice 0 is now slice slices()-1, ..., what used to be slice slices()-1 is now slice 0. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Returns:

a new flip view.

See Also:

viewRowFlip(), viewColumnFlip()

viewSorted

public ObjectMatrix3D viewSorted(int row,
                        int column)

Sorts the matrix slices into ascending order, according to the natural ordering of the matrix values in the given [row,column] position. This sort is guaranteed to be stable. For further information, see ObjectSorting.sort(ObjectMatrix3D,int,int) . For more advanced sorting functionality, see ObjectSorting.

Returns:

a new sorted vector (matrix) view.

Throws:

IndexOutOfBoundsException - if row < 0 || row >= rows() || column < 0 || column >= columns() .

viewStrides

public ObjectMatrix3D viewStrides(int sliceStride,
                         int rowStride,
                         int columnStride)

Constructs and returns a new stride view which is a sub matrix consisting of every i-th cell. More specifically, the view has this.slices()/sliceStride slices and this.rows()/rowStride rows and this.columns()/columnStride columns holding cells this.get(k*sliceStride,i*rowStride,j*columnStride) for all k = 0..slices()/sliceStride - 1, i = 0..rows()/rowStride - 1, j = 0..columns()/columnStride - 1 . The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.

Parameters:

sliceStride - the slice step factor.

rowStride - the row step factor.

columnStride - the column step factor.

Returns:

a new view.

Throws:

IndexOutOfBoundsException - if sliceStride<=0 || rowStride<=0 || columnStride<=0 .