public class DenseDoubleMatrix3D extends DoubleMatrix3D
Implementation:
Internally holds one single contigous one-dimensional array, addressed in (in decreasing order of significance): slice major, row major, column major. Note that this implementation is not synchronized.
Memory requirements:
memory [bytes] = 8*slices()*rows()*columns(). Thus, a 100*100*100 matrix uses 8 MB.
Time complexity:
O(1) (i.e. constant time) for the basic operations get, getQuick, set, setQuick and size,
Applications demanding utmost speed can exploit knowledge about the internal addressing. Setting/getting values in a loop slice-by-slice, row-by-row, column-by-column is quicker than, for example, column-by-column, row-by-row, slice-by-slice. Thus
for (int slice=0; slice < slices; slice++) {
for (int row=0; row < rows; row++) {
for (int column=0; column < columns; column++) {
matrix.setQuick(slice,row,column,someValue);
}
}
}
is quicker than
for (int column=0; column < columns; column++) {
for (int row=0; row < rows; row++) {
for (int slice=0; slice < slices; slice++) {
matrix.setQuick(slice,row,column,someValue);
}
}
}
| Modifier and Type | Field and Description |
|---|---|
protected double[] |
elements
The elements of this matrix.
|
columns, columnStride, columnZero, rows, rowStride, rowZero, slices, sliceStride, sliceZeroisNoViewserialVersionUID| Modifier | Constructor and Description |
|---|---|
|
DenseDoubleMatrix3D(double[][][] values)
Constructs a matrix with a copy of the given values.
|
|
DenseDoubleMatrix3D(int slices,
int rows,
int columns)
Constructs a matrix with a given number of slices, rows and columns.
|
protected |
DenseDoubleMatrix3D(int slices,
int rows,
int columns,
double[] elements,
int sliceZero,
int rowZero,
int columnZero,
int sliceStride,
int rowStride,
int columnStride)
Constructs a view with the given parameters.
|
| Modifier and Type | Method and Description |
|---|---|
DoubleMatrix3D |
assign(double[][][] values)
Sets all cells to the state specified by values.
|
DoubleMatrix3D |
assign(DoubleMatrix3D source)
Replaces all cell values of the receiver with the values of another matrix.
|
double |
getQuick(int slice,
int row,
int column)
Returns the matrix cell value at coordinate [slice,row,column].
|
protected boolean |
haveSharedCellsRaw(DoubleMatrix3D other)
Returns true if both matrices share common cells.
|
protected int |
index(int slice,
int row,
int column)
Returns the position of the given coordinate within the (virtual or non-virtual) internal 1-dimensional array.
|
DoubleMatrix3D |
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.
|
protected DoubleMatrix2D |
like2D(int rows,
int columns,
int rowZero,
int columnZero,
int rowStride,
int columnStride)
Construct and returns a new 2-d matrix of the corresponding dynamic type, sharing the same cells.
|
void |
setQuick(int slice,
int row,
int column,
double value)
Sets the matrix cell at coordinate [slice,row,column] to the specified value.
|
protected DoubleMatrix3D |
viewSelectionLike(int[] sliceOffsets,
int[] rowOffsets,
int[] columnOffsets)
Construct and returns a new selection view.
|
void |
zAssign27Neighbors(DoubleMatrix3D B,
Double27Function function)
27 neighbor stencil transformation.
|
aggregate, aggregate, assign, assign, assign, cardinality, copy, equals, equals, get, getContent, getNonZeros, haveSharedCells, like, set, toArray, toString, view, viewColumn, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewSelection, viewSlice, viewSliceFlip, viewSorted, viewStrides, zSum_columnOffset, _columnRank, _rowOffset, _rowRank, _sliceOffset, _sliceRank, checkBox, checkColumn, checkColumnIndexes, checkRow, checkRowIndexes, checkShape, checkShape, checkSlice, checkSliceIndexes, columns, rows, setUp, setUp, shape, size, slices, toStringShort, vColumnFlip, vDice, vPart, vRowFlip, vSliceFlip, vStridesensureCapacity, isView, trimToSizecloneprotected double[] elements
public DenseDoubleMatrix3D(double[][][] values)
The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
values - The values to be filled into the new matrix.IllegalArgumentException - if for any 1 <= slice < values.length: values[slice].length != values[slice-1].length.IllegalArgumentException - if for any 1 <= row < values[0].length: values[slice][row].length != values[slice][row-1].length.public DenseDoubleMatrix3D(int slices,
int rows,
int columns)
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.IllegalArgumentException - if (double)slices*columns*rows > Integer.MAX_VALUE.IllegalArgumentException - if slices<0 || rows<0 || columns<0.protected DenseDoubleMatrix3D(int slices,
int rows,
int columns,
double[] elements,
int sliceZero,
int rowZero,
int columnZero,
int sliceStride,
int rowStride,
int columnStride)
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.elements - the cells.sliceZero - the position of the first element.rowZero - the position of the first element.columnZero - the position of the first element.sliceStride - the number of elements between two slices, i.e. index(k+1,i,j)-index(k,i,j).rowStride - the number of elements between two rows, i.e. index(k,i+1,j)-index(k,i,j).columnnStride - the number of elements between two columns, i.e. index(k,i,j+1)-index(k,i,j).IllegalArgumentException - if (double)slices*columns*rows > Integer.MAX_VALUE.IllegalArgumentException - if slices<0 || rows<0 || columns<0.public DoubleMatrix3D assign(double[][][] values)
The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
assign in class DoubleMatrix3Dvalues - the values to be filled into the cells.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().public DoubleMatrix3D assign(DoubleMatrix3D source)
assign in class DoubleMatrix3Dsource - the source matrix to copy from (may be identical to the receiver).IllegalArgumentException - if slices() != source.slices() || rows() != source.rows() || columns() != source.columns()public double getQuick(int slice,
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): slice<0 || slice>=slices() || row<0 || row>=rows() || column<0 || column>=column().
getQuick in class DoubleMatrix3Dslice - the index of the slice-coordinate.row - the index of the row-coordinate.column - the index of the column-coordinate.protected boolean haveSharedCellsRaw(DoubleMatrix3D other)
haveSharedCellsRaw in class DoubleMatrix3Dprotected int index(int slice,
int row,
int column)
index in class AbstractMatrix3Dslice - the index of the slice-coordinate.row - the index of the row-coordinate.column - the index of the third-coordinate.public DoubleMatrix3D like(int slices, int rows, int columns)
like in class DoubleMatrix3Dslices - 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.protected DoubleMatrix2D like2D(int rows, int columns, int rowZero, int columnZero, int rowStride, int columnStride)
like2D in class DoubleMatrix3Drows - the number of rows the matrix shall have.columns - the number of columns the matrix shall have.rowZero - the position of the first element.columnZero - the position of the first element.rowStride - the number of elements between two rows, i.e. index(i+1,j)-index(i,j).columnStride - the number of elements between two columns, i.e. index(i,j+1)-index(i,j).public void setQuick(int slice,
int row,
int column,
double 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().
setQuick in class DoubleMatrix3Dslice - 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.protected DoubleMatrix3D viewSelectionLike(int[] sliceOffsets, int[] rowOffsets, int[] columnOffsets)
viewSelectionLike in class DoubleMatrix3DsliceOffsets - the offsets of the visible elements.rowOffsets - the offsets of the visible elements.columnOffsets - the offsets of the visible elements.public void zAssign27Neighbors(DoubleMatrix3D B, Double27Function function)
B[k,i,j] = function.apply( A[k-1,i-1,j-1], A[k-1,i-1,j], A[k-1,i-1,j+1], A[k-1,i, j-1], A[k-1,i, j], A[k-1,i, j+1], A[k-1,i+1,j-1], A[k-1,i+1,j], A[k-1,i+1,j+1], A[k ,i-1,j-1], A[k ,i-1,j], A[k ,i-1,j+1], A[k ,i, j-1], A[k ,i, j], A[k ,i, j+1], A[k ,i+1,j-1], A[k ,i+1,j], A[k ,i+1,j+1], A[k+1,i-1,j-1], A[k+1,i-1,j], A[k+1,i-1,j+1], A[k+1,i, j-1], A[k+1,i, j], A[k+1,i, j+1], A[k+1,i+1,j-1], A[k+1,i+1,j], A[k+1,i+1,j+1] ) x x x - - x x x - - - - x o x - - x o x - - - - x x x - - x x x ... - x x x - - - - - - - - - x o x - - - - - - - - - x x xMake sure that cells of this and B do not overlap. In case of overlapping views, behaviour is unspecified.
Example:
final double alpha = 0.25;
final double beta = 0.75;
cern.colt.function.Double27Function f = new cern.colt.function.Double27Function() {
public final double apply(
double a000, double a001, double a002,
double a010, double a011, double a012,
double a020, double a021, double a022,
double a100, double a101, double a102,
double a110, double a111, double a112,
double a120, double a121, double a122,
double a200, double a201, double a202,
double a210, double a211, double a212,
double a220, double a221, double a222) {
return beta*a111 + alpha*(a000 + ... + a222);
}
};
A.zAssign27Neighbors(B,f);
zAssign27Neighbors in class DoubleMatrix3DB - the matrix to hold the results.function - the function to be applied to the 27 cells.NullPointerException - if function==null.IllegalArgumentException - if rows() != B.rows() || columns() != B.columns() || slices() != B.slices() .Copyright © 2006–2019 SYSTAP, LLC DBA Blazegraph. All rights reserved.