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);
}
}
}
serialVersionUID| 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.
|
| 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].
|
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.
|
void |
setQuick(int slice,
int row,
int column,
double value)
Sets the matrix cell at coordinate [slice,row,column] to the specified value.
|
void |
zAssign27Neighbors(DoubleMatrix3D B,
Double27Function function)
27 neighbor stencil transformation.
|
aggregate, aggregate, assign, assign, assign, cardinality, copy, equals, equals, get, getNonZeros, like, set, toArray, toString, viewColumn, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewSelection, viewSlice, viewSliceFlip, viewSorted, viewStrides, zSumcheckShape, checkShape, columns, rows, size, slices, toStringShortensureCapacity, trimToSizeclonepublic 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.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.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.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.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() .Jas4pp 1.5 © Java Analysis Studio for Particle Physics