public class DenseColumnIntMatrix2D extends IntMatrix2D
Implementation:
Internally holds one single contigous one-dimensional array, addressed in column major. Note that this implementation is not synchronized.
Time complexity:
O(1) (i.e. constant time) for the basic operations get, getQuick, set, setQuick and size,
Cells are internally addressed in column-major. Applications demanding utmost speed can exploit this fact. Setting/getting values in a loop column-by-column is quicker than row-by-row. Thus
for (int column = 0; column < columns; column++) {
for (int row = 0; row < rows; row++) {
matrix.setQuick(row, column, someValue);
}
}
is quicker than
for (int row = 0; row < rows; row++) {
for (int column = 0; column < columns; column++) {
matrix.setQuick(row, column, someValue);
}
}
| Constructor and Description |
|---|
DenseColumnIntMatrix2D(int[][] values)
Constructs a matrix with a copy of the given values.
|
DenseColumnIntMatrix2D(int rows,
int columns)
Constructs a matrix with a given number of rows and columns.
|
DenseColumnIntMatrix2D(int rows,
int columns,
int[] elements,
int rowZero,
int columnZero,
int rowStride,
int columnStride,
boolean isView)
Constructs a matrix with the given parameters.
|
DenseColumnIntMatrix2D(MatrixVectorReader reader)
Constructs a matrix from MatrixVectorReader.
|
| Modifier and Type | Method and Description |
|---|---|
int |
aggregate(IntIntFunction aggr,
IntFunction f)
Applies a function to each cell and aggregates the results.
|
int |
aggregate(IntIntFunction aggr,
IntFunction f,
IntArrayList rowList,
IntArrayList columnList)
Applies a function to all cells with a given indexes and aggregates the
results.
|
int |
aggregate(IntIntFunction aggr,
IntFunction f,
IntProcedure cond)
Applies a function to each cell that satisfies a condition and aggregates
the results.
|
int |
aggregate(IntMatrix2D other,
IntIntFunction aggr,
IntIntFunction f)
Applies a function to each corresponding cell of two matrices and
aggregates the results.
|
IntMatrix2D |
assign(int value)
Sets all cells to the state specified by value.
|
IntMatrix2D |
assign(int[] values)
Sets all cells to the state specified by values.
|
IntMatrix2D |
assign(int[][] values)
Sets all cells to the state specified by values.
|
IntMatrix2D |
assign(IntFunction function)
Assigns the result of a function to each cell;
x[row,col] = function(x[row,col]).
|
IntMatrix2D |
assign(IntMatrix2D source)
Replaces all cell values of the receiver with the values of another
matrix.
|
IntMatrix2D |
assign(IntMatrix2D y,
IntIntFunction function)
Assigns the result of a function to each cell;
x[row,col] = function(x[row,col],y[row,col]).
|
IntMatrix2D |
assign(IntMatrix2D y,
IntIntFunction function,
IntArrayList rowList,
IntArrayList columnList)
Assigns the result of a function to all cells with a given indexes
|
IntMatrix2D |
assign(IntProcedure cond,
int value)
Assigns a value to all cells that satisfy a condition.
|
IntMatrix2D |
assign(IntProcedure cond,
IntFunction function)
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.
|
int[] |
elements()
Returns the elements of this matrix.
|
IntMatrix2D |
forEachNonZero(IntIntIntFunction function)
Assigns the result of a function to each non-zero cell;
x[row,col] = function(x[row,col]).
|
int[] |
getMaxLocation()
Return the maximum value of this matrix together with its location
|
int[] |
getMinLocation()
Return the minimum value of this matrix together with its location
|
void |
getNegativeValues(IntArrayList rowList,
IntArrayList columnList,
IntArrayList valueList)
Fills the coordinates and values of cells having negative values into the
specified lists.
|
void |
getNonZeros(IntArrayList rowList,
IntArrayList columnList,
IntArrayList valueList)
Fills the coordinates and values of cells having non-zero values into the
specified lists.
|
void |
getPositiveValues(IntArrayList rowList,
IntArrayList columnList,
IntArrayList valueList)
Fills the coordinates and values of cells having positive values into the
specified lists.
|
int |
getQuick(int row,
int column)
Returns the matrix cell value at coordinate [row,column].
|
DenseIntMatrix2D |
getRowMajor()
Returns a new matrix that has the same elements as this matrix, but they
are addressed internally in row major.
|
long |
index(int row,
int column)
Returns the position of the given coordinate within the (virtual or
non-virtual) internal 1-dimensional array.
|
IntMatrix2D |
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.
|
IntMatrix1D |
like1D(int size)
Construct and returns a new 1-d matrix of the corresponding dynamic
type, entirelly independent of the receiver.
|
void |
setQuick(int row,
int column,
int value)
Sets the matrix cell at coordinate [row,column] to the specified
value.
|
int[][] |
toArray()
Constructs and returns a 2-dimensional array containing the cell values.
|
IntMatrix1D |
vectorize()
Returns a vector obtained by stacking the columns of the matrix on top of
one another.
|
int |
zSum()
Returns the sum of all cells; Sum( x[i,j] ).
|
copy, equals, equals, get, like, set, toString, viewColumn, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewSelection, viewSelection, viewSorted, viewStrides, zMult, zMult, zMult, zMultcheckShape, checkShape, columns, columnStride, rows, rowStride, size, toStringShortensureCapacity, isView, trimToSizeclonepublic DenseColumnIntMatrix2D(int[][] 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 <= row < values.length: values[row].length != values[row-1].length
.public DenseColumnIntMatrix2D(int rows,
int columns)
rows - the number of rows the matrix shall have.columns - the number of columns the matrix shall have.IllegalArgumentException - if
rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE
.public DenseColumnIntMatrix2D(int rows,
int columns,
int[] elements,
int rowZero,
int columnZero,
int rowStride,
int columnStride,
boolean isView)
rows - the number of rows the matrix shall have.columns - the number of columns the matrix shall have.elements - the cells.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).isView - if true then a matrix view is constructedIllegalArgumentException - if
rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE
or flip's are illegal.public DenseColumnIntMatrix2D(MatrixVectorReader reader) throws IOException
reader - matrix readerIOExceptionpublic int aggregate(IntIntFunction aggr, IntFunction f)
IntMatrix2DExample:
cern.jet.math.Functions F = cern.jet.math.Functions.functions; 2 x 2 matrix 0 1 2 3 // Sum( x[row,col]*x[row,col] ) matrix.aggregate(F.plus,F.square); --> 14For further examples, see the package doc.
aggregate in class IntMatrix2Daggr - 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.IntFunctionspublic int aggregate(IntIntFunction aggr, IntFunction f, IntProcedure cond)
IntMatrix2Daggregate in class IntMatrix2Daggr - 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.IntFunctionspublic int aggregate(IntIntFunction aggr, IntFunction f, IntArrayList rowList, IntArrayList columnList)
IntMatrix2Daggregate in class IntMatrix2Daggr - 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.rowList - row indexes.columnList - column indexes.IntFunctionspublic int aggregate(IntMatrix2D other, IntIntFunction aggr, IntIntFunction f)
IntMatrix2DExample:
cern.jet.math.Functions F = cern.jet.math.Functions.functions; x == 2 x 2 matrix 0 1 2 3 y == 2 x 2 matrix 0 1 2 3 // Sum( x[row,col] * y[row,col] ) x.aggregate(y, F.plus, F.mult); --> 14 // Sum( (x[row,col] + y[row,col])ˆ2 ) x.aggregate(y, F.plus, F.chain(F.square,F.plus)); --> 56For further examples, see the package doc.
aggregate in class IntMatrix2Daggr - 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.IntFunctionspublic IntMatrix2D assign(IntFunction function)
IntMatrix2DExample:
matrix = 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); --> 2 x 2 matrix 0.479426 0.997495 0.598472 -0.350783For further examples, see the package doc.
assign in class IntMatrix2Dfunction - a function object taking as argument the current cell's value.IntFunctionspublic IntMatrix2D assign(IntProcedure cond, IntFunction function)
IntMatrix2Dassign in class IntMatrix2Dcond - a condition.function - a function object.IntFunctionspublic IntMatrix2D assign(IntProcedure cond, int value)
IntMatrix2Dassign in class IntMatrix2Dcond - a condition.value - a value.public IntMatrix2D assign(int value)
IntMatrix2Dassign in class IntMatrix2Dvalue - the value to be filled into the cells.public IntMatrix2D assign(int[] values)
IntMatrix2DThe values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
assign in class IntMatrix2Dvalues - the values to be filled into the cells.public IntMatrix2D assign(int[][] values)
IntMatrix2DThe values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
assign in class IntMatrix2Dvalues - the values to be filled into the cells.public IntMatrix2D assign(IntMatrix2D source)
IntMatrix2Dassign in class IntMatrix2Dsource - the source matrix to copy from (may be identical to the
receiver).public IntMatrix2D assign(IntMatrix2D y, IntIntFunction function)
IntMatrix2DExample:
// assign x[row,col] = x[row,col]<sup>y[row,col]</sup> m1 = 2 x 2 matrix 0 1 2 3 m2 = 2 x 2 matrix 0 2 4 6 m1.assign(m2, cern.jet.math.Functions.pow); --> m1 == 2 x 2 matrix 1 1 16 729For further examples, see the package doc.
assign in class IntMatrix2Dy - 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,IntFunctionspublic IntMatrix2D assign(IntMatrix2D y, IntIntFunction function, IntArrayList rowList, IntArrayList columnList)
IntMatrix2Dassign in class IntMatrix2Dy - 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,rowList - row indexes.columnList - column indexes.IntFunctionspublic int cardinality()
IntMatrix2Dcardinality in class IntMatrix2Dpublic int[] elements()
IntMatrix2Delements in class IntMatrix2Dpublic IntMatrix2D forEachNonZero(IntIntIntFunction function)
IntMatrix2DforEachNonZero in class IntMatrix2Dfunction - a function object taking as argument the current non-zero
cell's row, column and value.public DenseIntMatrix2D getRowMajor()
public void getNegativeValues(IntArrayList rowList, IntArrayList columnList, IntArrayList valueList)
IntMatrix2DgetNegativeValues in class IntMatrix2DrowList - 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.public void getNonZeros(IntArrayList rowList, IntArrayList columnList, IntArrayList valueList)
IntMatrix2DIn general, fill order is unspecified. This implementation fills like for (row = 0..rows-1) for (column = 0..columns-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).
Example:
2 x 3 matrix: 0, 0, 8 0, 7, 0 --> rowList = (0,1) columnList = (2,1) valueList = (8,7)In other words, get(0,2)==8, get(1,1)==7.
getNonZeros in class IntMatrix2DrowList - 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.public void getPositiveValues(IntArrayList rowList, IntArrayList columnList, IntArrayList valueList)
IntMatrix2DgetPositiveValues in class IntMatrix2DrowList - 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.public int getQuick(int row,
int column)
IntMatrix2DProvided 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 IntMatrix2Drow - the index of the row-coordinate.column - the index of the column-coordinate.public long index(int row,
int column)
AbstractMatrix2Dindex in class AbstractMatrix2Drow - the index of the row-coordinate.column - the index of the column-coordinate.public IntMatrix2D like(int rows, int columns)
IntMatrix2Dlike in class IntMatrix2Drows - the number of rows the matrix shall have.columns - the number of columns the matrix shall have.public IntMatrix1D like1D(int size)
IntMatrix2Dlike1D in class IntMatrix2Dsize - the number of cells the matrix shall have.public int[] getMaxLocation()
IntMatrix2DgetMaxLocation in class IntMatrix2Dpublic int[] getMinLocation()
IntMatrix2DgetMinLocation in class IntMatrix2Dpublic void setQuick(int row,
int column,
int value)
IntMatrix2DProvided 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 IntMatrix2Drow - the index of the row-coordinate.column - the index of the column-coordinate.value - the value to be filled into the specified cell.public int[][] toArray()
IntMatrix2DThe values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
toArray in class IntMatrix2Dpublic IntMatrix1D vectorize()
IntMatrix2Dvectorize in class IntMatrix2Dpublic int zSum()
IntMatrix2DzSum in class IntMatrix2DJump to the Parallel Colt Homepage