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java.lang.Object cern.colt.PersistentObject cern.colt.matrix.AbstractMatrix cern.colt.matrix.AbstractMatrix2D cern.colt.matrix.tdouble.DoubleMatrix2D cern.colt.matrix.tdouble.impl.WrapperDoubleMatrix2D cern.colt.matrix.tdouble.impl.CCMDoubleMatrix2D
public class CCMDoubleMatrix2D
Sparse column-compressed-modified 2-d matrix holding double elements. Each column is stored as SparseDoubleMatrix1D.
Field Summary |
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Fields inherited from class cern.colt.PersistentObject |
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serialVersionUID |
Constructor Summary | |
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CCMDoubleMatrix2D(int rows,
int columns)
Constructs a matrix with a given number of rows and columns. |
Method Summary | |
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SparseDoubleMatrix1D[] |
elements()
Returns the elements of this matrix. |
double |
getQuick(int row,
int column)
Returns the matrix cell value at coordinate [row,column]. |
DoubleMatrix2D |
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. |
void |
setQuick(int row,
int column,
double value)
Sets the matrix cell at coordinate [row,column] to the specified value. |
void |
trimToSize()
Releases any superfluous internal memory. |
SparseDoubleMatrix1D |
viewColumn(int column)
Constructs and returns a new slice view representing the rows of the given column. |
Methods inherited from class cern.colt.matrix.tdouble.impl.WrapperDoubleMatrix2D |
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equals, equals, like1D, setNcolumns, setNrows, vectorize, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewStrides |
Methods inherited from class cern.colt.matrix.tdouble.DoubleMatrix2D |
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aggregate, aggregate, aggregate, aggregate, assign, 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 |
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 CCMDoubleMatrix2D(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
.Method Detail |
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public SparseDoubleMatrix1D[] elements()
DoubleMatrix2D
elements
in class WrapperDoubleMatrix2D
public double getQuick(int row, int column)
WrapperDoubleMatrix2D
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 WrapperDoubleMatrix2D
row
- the index of the row-coordinate.column
- the index of the column-coordinate.
public void setQuick(int row, int column, double value)
WrapperDoubleMatrix2D
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 WrapperDoubleMatrix2D
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 trimToSize()
AbstractMatrix
This default implementation does nothing. Override this method if necessary.
trimToSize
in class AbstractMatrix
public SparseDoubleMatrix1D viewColumn(int column)
WrapperDoubleMatrix2D
Example:
2 x 3 matrix: 1, 2, 3 4, 5, 6 |
viewColumn(0) ==> | Matrix1D of size 2: 1, 4 |
viewColumn
in class WrapperDoubleMatrix2D
column
- the column to fix.
WrapperDoubleMatrix2D.viewRow(int)
public DoubleMatrix2D like(int rows, int columns)
WrapperDoubleMatrix2D
like
in class WrapperDoubleMatrix2D
rows
- the number of rows the matrix shall have.columns
- the number of columns the matrix shall have.
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