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java.lang.Object cern.colt.PersistentObject cern.colt.matrix.AbstractMatrix cern.colt.matrix.AbstractMatrix2D cern.colt.matrix.tfloat.FloatMatrix2D cern.colt.matrix.tfloat.impl.WrapperFloatMatrix2D
public class WrapperFloatMatrix2D
2-d matrix holding float elements; either a view wrapping another matrix or a matrix whose views are wrappers.
Field Summary |
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Fields inherited from class cern.colt.PersistentObject |
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serialVersionUID |
Constructor Summary | |
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WrapperFloatMatrix2D(FloatMatrix2D newContent)
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Method Summary | |
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Object |
elements()
Returns the elements of this matrix. |
boolean |
equals(float value)
Returns whether all cells are equal to the given value. |
boolean |
equals(Object obj)
Compares this object against the specified object. |
float |
getQuick(int row,
int column)
Returns the matrix cell value at coordinate [row,column]. |
FloatMatrix2D |
like(int rows,
int columns)
Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of rows and columns. |
FloatMatrix1D |
like1D(int size)
Construct and returns a new 1-d matrix of the corresponding dynamic type, entirelly independent of the receiver. |
void |
setNcolumns(int columns)
Sets the number of rows of this matrix |
void |
setNrows(int rows)
Sets the number of rows of this matrix |
void |
setQuick(int row,
int column,
float value)
Sets the matrix cell at coordinate [row,column] to the specified value. |
FloatMatrix1D |
vectorize()
Returns a vector obtained by stacking the columns of the matrix on top of one another. |
FloatMatrix1D |
viewColumn(int column)
Constructs and returns a new slice view representing the rows of the given column. |
FloatMatrix2D |
viewColumnFlip()
Constructs and returns a new flip view along the column axis. |
FloatMatrix2D |
viewDice()
Constructs and returns a new dice (transposition) view; Swaps axes; example: 3 x 4 matrix --> 4 x 3 matrix. |
FloatMatrix2D |
viewPart(int row,
int column,
int height,
int width)
Constructs and returns a new sub-range view that is a height x width sub matrix starting at [row,column]. |
FloatMatrix1D |
viewRow(int row)
Constructs and returns a new slice view representing the columns of the given row. |
FloatMatrix2D |
viewRowFlip()
Constructs and returns a new flip view along the row axis. |
FloatMatrix2D |
viewSelection(int[] rowIndexes,
int[] columnIndexes)
Constructs and returns a new selection view that is a matrix holding the indicated cells. |
FloatMatrix2D |
viewStrides(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.tfloat.FloatMatrix2D |
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aggregate, aggregate, aggregate, aggregate, assign, assign, assign, assign, assign, assign, assign, assign, assign, cardinality, copy, forEachNonZero, get, getMaxLocation, getMinLocation, getNegativeValues, getNonZeros, getPositiveValues, like, normalize, set, toArray, toString, viewSelection, viewSelection, viewSorted, zAssign8Neighbors, zMult, zMult, zMult, zMult, zSum |
Methods inherited from class cern.colt.matrix.AbstractMatrix2D |
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checkShape, checkShape, columns, columnStride, index, rows, rowStride, size, toStringShort |
Methods inherited from class cern.colt.matrix.AbstractMatrix |
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ensureCapacity, isView, trimToSize |
Methods inherited from class cern.colt.PersistentObject |
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clone |
Methods inherited from class java.lang.Object |
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getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public WrapperFloatMatrix2D(FloatMatrix2D newContent)
Method Detail |
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public Object elements()
FloatMatrix2D
elements
in class FloatMatrix2D
public float getQuick(int row, int 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): 0 <= column < columns() && 0 <= row < rows().
getQuick
in class FloatMatrix2D
row
- the index of the row-coordinate.column
- the index of the column-coordinate.
public boolean equals(float value)
FloatMatrix2D
equals
in class FloatMatrix2D
value
- the value to test against.
public boolean equals(Object obj)
FloatMatrix2D
true
if and only if the argument is not null
and is at least a FloatMatrix2D
object that has the same
number of columns and rows as the receiver and has exactly the same
values at the same coordinates.
equals
in class FloatMatrix2D
obj
- the object to compare with.
true
if the objects are the same; false
otherwise.public FloatMatrix2D like(int rows, int columns)
like
in class FloatMatrix2D
rows
- the number of rows the matrix shall have.columns
- the number of columns the matrix shall have.
public FloatMatrix1D like1D(int size)
like1D
in class FloatMatrix2D
size
- the number of cells the matrix shall have.
public void setQuick(int row, int column, float 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): 0 <= column < columns() && 0 <= row < rows().
setQuick
in class FloatMatrix2D
row
- the index of the row-coordinate.column
- the index of the column-coordinate.value
- the value to be filled into the specified cell.public FloatMatrix1D vectorize()
vectorize
in class FloatMatrix2D
public FloatMatrix1D viewColumn(int column)
Example:
2 x 3 matrix: 1, 2, 3 4, 5, 6 |
viewColumn(0) ==> | Matrix1D of size 2: 1, 4 |
viewColumn
in class FloatMatrix2D
column
- the column to fix.
IndexOutOfBoundsException
- if column < 0 || column >= columns().viewRow(int)
public FloatMatrix2D viewColumnFlip()
Example:
2 x 3 matrix: 1, 2, 3 4, 5, 6 |
columnFlip ==> | 2 x 3 matrix: 3, 2, 1 6, 5, 4 |
columnFlip ==> | 2 x 3 matrix: 1, 2, 3 4, 5, 6 |
viewColumnFlip
in class FloatMatrix2D
viewRowFlip()
public FloatMatrix2D viewDice()
Example:
2 x 3 matrix: 1, 2, 3 4, 5, 6 |
transpose ==> | 3 x 2 matrix: 1, 4 2, 5 3, 6 |
transpose ==> | 2 x 3 matrix: 1, 2, 3 4, 5, 6 |
viewDice
in class FloatMatrix2D
public void setNcolumns(int columns)
columns
- public void setNrows(int rows)
rows
- public FloatMatrix2D viewPart(int row, int column, int height, int width)
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 [row,column] to [row+height-1,column+width-1], all inclusive. and has view.rows() == height; view.columns() == width;. A view's legal coordinates are again zero based, as usual. In other words, legal coordinates of the view range from [0,0] to [view.rows()-1==height-1,view.columns()-1==width-1]. As usual, any attempt to access a cell at a coordinate column<0 || column>=view.columns() || row<0 || row>=view.rows() will throw an IndexOutOfBoundsException.
viewPart
in class FloatMatrix2D
row
- The index of the row-coordinate.column
- The index of the column-coordinate.height
- The height of the box.width
- The width of the box.
IndexOutOfBoundsException
- if
column<0 || width<0 || column+width>columns() || row<0 || height<0 || row+height>rows()public FloatMatrix1D viewRow(int row)
Example:
2 x 3 matrix: 1, 2, 3 4, 5, 6 |
viewRow(0) ==> | Matrix1D of size 3: 1, 2, 3 |
viewRow
in class FloatMatrix2D
row
- the row to fix.
IndexOutOfBoundsException
- if row < 0 || row >= rows().viewColumn(int)
public FloatMatrix2D viewRowFlip()
Example:
2 x 3 matrix: 1, 2, 3 4, 5, 6 |
rowFlip ==> | 2 x 3 matrix: 4, 5, 6 1, 2, 3 |
rowFlip ==> | 2 x 3 matrix: 1, 2, 3 4, 5, 6 |
viewRowFlip
in class FloatMatrix2D
viewColumnFlip()
public FloatMatrix2D viewSelection(int[] rowIndexes, int[] columnIndexes)
Example:
this = 2 x 3 matrix: 1, 2, 3 4, 5, 6 rowIndexes = (0,1) columnIndexes = (1,0,1,0) --> view = 2 x 4 matrix: 2, 1, 2, 1 5, 4, 5, 4Note 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.
To indicate "all" rows or "all columns", simply set the respective parameter
viewSelection
in class FloatMatrix2D
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.
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.public FloatMatrix2D viewStrides(int _rowStride, int _columnStride)
viewStrides
in class FloatMatrix2D
_rowStride
- the row step factor._columnStride
- the column step factor.
IndexOutOfBoundsException
- if rowStride<=0 || columnStride<=0.
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