Class WrapperDoubleMatrix1D
- java.lang.Object
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- cern.colt.PersistentObject
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- cern.colt.matrix.impl.AbstractMatrix
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- cern.colt.matrix.impl.AbstractMatrix1D
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- cern.colt.matrix.DoubleMatrix1D
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- cern.colt.matrix.impl.WrapperDoubleMatrix1D
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- All Implemented Interfaces:
java.io.Serializable
,java.lang.Cloneable
- Direct Known Subclasses:
DelegateDoubleMatrix1D
class WrapperDoubleMatrix1D extends DoubleMatrix1D
1-d matrix holding double elements; either a view wrapping another matrix or a matrix whose views are wrappers.- Version:
- 1.0, 09/24/99
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Field Summary
Fields Modifier and Type Field Description protected DoubleMatrix1D
content
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Fields inherited from class cern.colt.matrix.impl.AbstractMatrix1D
size, stride, zero
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Fields inherited from class cern.colt.matrix.impl.AbstractMatrix
isNoView
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Fields inherited from class cern.colt.PersistentObject
serialVersionUID
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Constructor Summary
Constructors Constructor Description WrapperDoubleMatrix1D(DoubleMatrix1D newContent)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected DoubleMatrix1D
getContent()
Returns the content of this matrix if it is a wrapper; or this otherwise.double
getQuick(int index)
Returns the matrix cell value at coordinate index.DoubleMatrix1D
like(int size)
Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified size.DoubleMatrix2D
like2D(int rows, int columns)
Construct and returns a new 2-d matrix of the corresponding dynamic type, entirelly independent of the receiver.void
setQuick(int index, double value)
Sets the matrix cell at coordinate index to the specified value.DoubleMatrix1D
viewFlip()
Constructs and returns a new flip view.DoubleMatrix1D
viewPart(int index, int width)
Constructs and returns a new sub-range view that is a width sub matrix starting at index.DoubleMatrix1D
viewSelection(int[] indexes)
Constructs and returns a new selection view that is a matrix holding the indicated cells.protected DoubleMatrix1D
viewSelectionLike(int[] offsets)
Construct and returns a new selection view.DoubleMatrix1D
viewStrides(int _stride)
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.DoubleMatrix1D
aggregate, aggregate, assign, assign, assign, assign, assign, assign, cardinality, cardinality, copy, equals, equals, get, getNonZeros, getNonZeros, haveSharedCells, haveSharedCellsRaw, like, set, swap, toArray, toArray, toString, view, viewSelection, viewSorted, zDotProduct, zDotProduct, zDotProduct, zDotProduct, zSum
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Methods inherited from class cern.colt.matrix.impl.AbstractMatrix1D
_offset, _rank, checkIndex, checkIndexes, checkRange, checkSize, checkSize, index, setUp, setUp, size, stride, toStringShort, vFlip, vPart, vStrides
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Methods inherited from class cern.colt.matrix.impl.AbstractMatrix
ensureCapacity, isView, trimToSize
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Methods inherited from class cern.colt.PersistentObject
clone
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Field Detail
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content
protected DoubleMatrix1D content
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Constructor Detail
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WrapperDoubleMatrix1D
public WrapperDoubleMatrix1D(DoubleMatrix1D newContent)
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Method Detail
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getContent
protected DoubleMatrix1D getContent()
Returns the content of this matrix if it is a wrapper; or this otherwise. Override this method in wrappers.- Overrides:
getContent
in classDoubleMatrix1D
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getQuick
public double getQuick(int index)
Returns the matrix cell value at coordinate index.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): index<0 || index>=size().
- Specified by:
getQuick
in classDoubleMatrix1D
- Parameters:
index
- the index of the cell.- Returns:
- the value of the specified cell.
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like
public DoubleMatrix1D like(int size)
Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified size. For example, if the receiver is an instance of type DenseDoubleMatrix1D the new matrix must also be of type DenseDoubleMatrix1D, if the receiver is an instance of type SparseDoubleMatrix1D the new matrix must also be of type SparseDoubleMatrix1D, etc. In general, the new matrix should have internal parametrization as similar as possible.- Specified by:
like
in classDoubleMatrix1D
- Parameters:
size
- the number of cell the matrix shall have.- Returns:
- a new empty matrix of the same dynamic type.
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like2D
public DoubleMatrix2D like2D(int rows, int columns)
Construct and returns a new 2-d matrix of the corresponding dynamic type, entirelly independent of the receiver. For example, if the receiver is an instance of type DenseDoubleMatrix1D the new matrix must be of type DenseDoubleMatrix2D, if the receiver is an instance of type SparseDoubleMatrix1D the new matrix must be of type SparseDoubleMatrix2D, etc.- Specified by:
like2D
in classDoubleMatrix1D
- 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.
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setQuick
public void setQuick(int index, double value)
Sets the matrix cell at coordinate index 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): index<0 || index>=size().
- Specified by:
setQuick
in classDoubleMatrix1D
- Parameters:
index
- the index of the cell.value
- the value to be filled into the specified cell.
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viewFlip
public DoubleMatrix1D viewFlip()
Constructs and returns a new flip view. What used to be index 0 is now index size()-1, ..., what used to be index size()-1 is now index 0. The returned view is backed by this matrix, so changes in the returned view are reflected in this matrix, and vice-versa.- Overrides:
viewFlip
in classDoubleMatrix1D
- Returns:
- a new flip view.
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viewPart
public DoubleMatrix1D viewPart(int index, int width)
Constructs and returns a new sub-range view that is a width sub matrix starting at index. Operations on the returned view can only be applied to the restricted range. Any attempt to access coordinates not contained in the view will throw an IndexOutOfBoundsException.Note that the view is really just a range restriction: The returned matrix is backed by this matrix, so changes in the returned matrix are reflected in this matrix, and vice-versa.
The view contains the cells from index..index+width-1. and has view.size() == width. A view's legal coordinates are again zero based, as usual. In other words, legal coordinates of the view are 0 .. view.size()-1==width-1. As usual, any attempt to access a cell at other coordinates will throw an IndexOutOfBoundsException.
- Overrides:
viewPart
in classDoubleMatrix1D
- Parameters:
index
- The index of the first cell.width
- The width of the range.- Returns:
- the new view.
- Throws:
java.lang.IndexOutOfBoundsException
- if index<0 || width<0 || index+width>size().
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viewSelection
public DoubleMatrix1D viewSelection(int[] indexes)
Constructs and returns a new selection view that is a matrix holding the indicated cells. There holds view.size() == indexes.length and view.get(i) == this.get(indexes[i]). Indexes can occur multiple times and can be in arbitrary order.Example:
this = (0,0,8,0,7) indexes = (0,2,4,2) --> view = (0,8,7,8)
Note that modifying indexes 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.- Overrides:
viewSelection
in classDoubleMatrix1D
- Parameters:
indexes
- The indexes of the cells that shall be visible in the new view. To indicate that all cells shall be visible, simply set this parameter to null.- Returns:
- the new view.
- Throws:
java.lang.IndexOutOfBoundsException
- if !(0 <= indexes[i] < size()) for any i=0..indexes.length()-1.
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viewSelectionLike
protected DoubleMatrix1D viewSelectionLike(int[] offsets)
Construct and returns a new selection view.- Specified by:
viewSelectionLike
in classDoubleMatrix1D
- Parameters:
offsets
- the offsets of the visible elements.- Returns:
- a new view.
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viewStrides
public DoubleMatrix1D viewStrides(int _stride)
Constructs and returns a new stride view which is a sub matrix consisting of every i-th cell. More specifically, the view has size this.size()/stride holding cells this.get(i*stride) for all i = 0..size()/stride - 1.- Overrides:
viewStrides
in classDoubleMatrix1D
- Parameters:
stride
- the step factor.- Returns:
- the new view.
- Throws:
java.lang.IndexOutOfBoundsException
- if stride <= 0.
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