DenseColumnLongMatrix2D (Parallel Colt 0.10.1

java.lang.Object
- cern.colt.PersistentObject
- - cern.colt.matrix.AbstractMatrix
  - - cern.colt.matrix.AbstractMatrix2D
    - - cern.colt.matrix.tlong.LongMatrix2D
      - cern.colt.matrix.tlong.impl.DenseColumnLongMatrix2D

All Implemented Interfaces:

Serializable, Cloneable
```
public class DenseColumnLongMatrix2D
extends LongMatrix2D
```
Dense 2-d matrix holding long elements. First see the package summary and javadoc tree view to get the broad picture.
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);
     }
 }
 
 
```
Author:

Piotr Wendykier (piotr.wendykier@gmail.com)

See Also:
Serialized Form

Constructor Summary

Constructors
Constructor and Description
`DenseColumnLongMatrix2D(int rows, int columns)` Constructs a matrix with a given number of rows and columns.
`DenseColumnLongMatrix2D(int rows, int columns, long[] elements, int rowZero, int columnZero, int rowStride, int columnStride, boolean isView)` Constructs a matrix with the given parameters.
`DenseColumnLongMatrix2D(long[][] values)` Constructs a matrix with a copy of the given values.
`DenseColumnLongMatrix2D(MatrixVectorReader reader)` Constructs a matrix from MatrixVectorReader.

Method Summary

Methods
Modifier and Type	Method and Description
`long`	`aggregate(LongLongFunction aggr, LongFunction f)` Applies a function to each cell and aggregates the results.
`long`	`aggregate(LongLongFunction aggr, LongFunction f, IntArrayList rowList, IntArrayList columnList)` Applies a function to all cells with a given indexes and aggregates the results.
`long`	`aggregate(LongLongFunction aggr, LongFunction f, LongProcedure cond)` Applies a function to each cell that satisfies a condition and aggregates the results.
`long`	`aggregate(LongMatrix2D other, LongLongFunction aggr, LongLongFunction f)` Applies a function to each corresponding cell of two matrices and aggregates the results.
`LongMatrix2D`	`assign(long value)` Sets all cells to the state specified by `value`.
`LongMatrix2D`	`assign(long[] values)` Sets all cells to the state specified by `values`.
`LongMatrix2D`	`assign(long[][] values)` Sets all cells to the state specified by `values`.
`LongMatrix2D`	`assign(LongFunction function)` Assigns the result of a function to each cell; `x[row,col] = function(x[row,col])`.
`LongMatrix2D`	`assign(LongMatrix2D source)` Replaces all cell values of the receiver with the values of another matrix.
`LongMatrix2D`	`assign(LongMatrix2D y, LongLongFunction function)` Assigns the result of a function to each cell; `x[row,col] = function(x[row,col],y[row,col])`.
`LongMatrix2D`	`assign(LongMatrix2D y, LongLongFunction function, IntArrayList rowList, IntArrayList columnList)` Assigns the result of a function to all cells with a given indexes
`LongMatrix2D`	`assign(LongProcedure cond, long value)` Assigns a value to all cells that satisfy a condition.
`LongMatrix2D`	`assign(LongProcedure cond, LongFunction 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.
`long[]`	`elements()` Returns the elements of this matrix.
`LongMatrix2D`	`forEachNonZero(IntIntLongFunction function)` Assigns the result of a function to each non-zero cell; `x[row,col] = function(x[row,col])`.
`long[]`	`getMaxLocation()` Return the maximum value of this matrix together with its location
`long[]`	`getMinLocation()` Return the minimum value of this matrix together with its location
`void`	`getNegativeValues(IntArrayList rowList, IntArrayList columnList, LongArrayList valueList)` Fills the coordinates and values of cells having negative values into the specified lists.
`void`	`getNonZeros(IntArrayList rowList, IntArrayList columnList, LongArrayList valueList)` Fills the coordinates and values of cells having non-zero values into the specified lists.
`void`	`getPositiveValues(IntArrayList rowList, IntArrayList columnList, LongArrayList valueList)` Fills the coordinates and values of cells having positive values into the specified lists.
`long`	`getQuick(int row, int column)` Returns the matrix cell value at coordinate `[row,column]`.
`DenseLongMatrix2D`	`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.
`LongMatrix2D`	`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.
`LongMatrix1D`	`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, long value)` Sets the matrix cell at coordinate `[row,column]` to the specified value.
`long[][]`	`toArray()` Constructs and returns a 2-dimensional array containing the cell values.
`LongMatrix1D`	`vectorize()` Returns a vector obtained by stacking the columns of the matrix on top of one another.
`long`	`zSum()` Returns the sum of all cells; `Sum( x[i,j] )`.

Methods inherited from class cern.colt.matrix.tlong.LongMatrix2D
assign, copy, equals, equals, get, like, set, toString, viewColumn, viewColumnFlip, viewDice, viewPart, viewRow, viewRowFlip, viewSelection, viewSelection, viewSelection, viewSorted, viewStrides, zMult, zMult, zMult, zMult

Methods inherited from class cern.colt.matrix.AbstractMatrix2D
checkShape, checkShape, columns, columnStride, rows, rowStride, size, toStringShort

Methods inherited from class cern.colt.matrix.AbstractMatrix
ensureCapacity, isView, trimToSize

Methods inherited from class cern.colt.PersistentObject
clone

Methods inherited from class java.lang.Object
getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - DenseColumnLongMatrix2D
```
public DenseColumnLongMatrix2D(long[][] values)
```
    Constructs a matrix with a copy of the given values. values is required to have the form values[row][column] and have exactly the same number of columns in every row.
    The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
    
    Parameters:
    values - The values to be filled into the new matrix.
    
    Throws:
    
    IllegalArgumentException - if for any 1 <= row < values.length: values[row].length != values[row-1].length .
  - DenseColumnLongMatrix2D
```
public DenseColumnLongMatrix2D(int rows,
                       int columns)
```
    Constructs a matrix with a given number of rows and columns. All entries are initially 0.
    
    Parameters:
    rows - the number of rows the matrix shall have.
    columns - the number of columns the matrix shall have.
    
    Throws:
    
    IllegalArgumentException - if rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE .
  - DenseColumnLongMatrix2D
```
public DenseColumnLongMatrix2D(int rows,
                       int columns,
                       long[] elements,
                       int rowZero,
                       int columnZero,
                       int rowStride,
                       int columnStride,
                       boolean isView)
```
    Constructs a matrix with the given parameters.
    
    Parameters:
    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 constructed
    
    Throws:
    
    IllegalArgumentException - if rows<0 || columns<0 || (double)columns*rows > Integer.MAX_VALUE or flip's are illegal.
  - DenseColumnLongMatrix2D
```
public DenseColumnLongMatrix2D(MatrixVectorReader reader)
                        throws IOException
```
    Constructs a matrix from MatrixVectorReader.
    
    Parameters:
    reader - matrix reader
    
    Throws:
    
    IOException
- Method Detail
  - aggregate
```
public long aggregate(LongLongFunction aggr,
             LongFunction f)
```
    Description copied from class: LongMatrix2D
    Applies a function to each cell and aggregates the results. Returns a value v such that v==a(size()) where a(i) == aggr( a(i-1), f(get(row,column)) ) and terminators are a(1) == f(get(0,0)), a(0)==Long.NaN.
    Example:
```
   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);
   --> 14
 
 
```
    For further examples, see the package doc.
    Overrides:
    
    aggregate in class LongMatrix2D
    
    Parameters:
    aggr - 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.
    
    Returns:
    the aggregated measure.
    See Also:
    LongFunctions
  - aggregate
```
public long aggregate(LongLongFunction aggr,
             LongFunction f,
             LongProcedure cond)
```
    Description copied from class: LongMatrix2D
    
    Applies a function to each cell that satisfies a condition and aggregates the results.
    
    Overrides:
    
    aggregate in class LongMatrix2D
    
    Parameters:
    aggr - 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.
    
    Returns:
    the aggregated measure.
    See Also:
    LongFunctions
  - aggregate
```
public long aggregate(LongLongFunction aggr,
             LongFunction f,
             IntArrayList rowList,
             IntArrayList columnList)
```
    Description copied from class: LongMatrix2D
    
    Applies a function to all cells with a given indexes and aggregates the results.
    
    Overrides:
    
    aggregate in class LongMatrix2D
    
    Parameters:
    aggr - 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.
    
    Returns:
    the aggregated measure.
    See Also:
    LongFunctions
  - aggregate
```
public long aggregate(LongMatrix2D other,
             LongLongFunction aggr,
             LongLongFunction f)
```
    Description copied from class: LongMatrix2D
    Applies a function to each corresponding cell of two matrices and aggregates the results. Returns a value v such that v==a(size()) where a(i) == aggr( a(i-1), f(get(row,column),other.get(row,column)) ) and terminators are a(1) == f(get(0,0),other.get(0,0)), a(0)==Long.NaN.
    Example:
```
   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));
   --> 56
 
 
```
    For further examples, see the package doc.
    Overrides:
    
    aggregate in class LongMatrix2D
    
    aggr - 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.
    
    Returns:
    the aggregated measure.
    See Also:
    LongFunctions
  - assign
```
public LongMatrix2D assign(LongFunction function)
```
    Description copied from class: LongMatrix2D
    Assigns the result of a function to each cell; x[row,col] = function(x[row,col]).
    Example:
```
   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 -0.350783
 
 
```
    For further examples, see the package doc.
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    function - a function object taking as argument the current cell's value.
    
    Returns:
    this (for convenience only).
    See Also:
    LongFunctions
  - assign
```
public LongMatrix2D assign(LongProcedure cond,
                  LongFunction function)
```
    Description copied from class: LongMatrix2D
    
    Assigns the result of a function to all cells that satisfy a condition.
    
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    cond - a condition.
    function - a function object.
    
    Returns:
    this (for convenience only).
    See Also:
    LongFunctions
  - assign
```
public LongMatrix2D assign(LongProcedure cond,
                  long value)
```
    Description copied from class: LongMatrix2D
    
    Assigns a value to all cells that satisfy a condition.
    
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    cond - a condition.
    value - a value.
    
    Returns:
    this (for convenience only).
  - assign
```
public LongMatrix2D assign(long value)
```
    Description copied from class: LongMatrix2D
    
    Sets all cells to the state specified by value.
    
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    value - the value to be filled into the cells.
    
    Returns:
    this (for convenience only).
  - assign
```
public LongMatrix2D assign(long[] values)
```
    Description copied from class: LongMatrix2D
    
    Sets all cells to the state specified by values. values is required to have the form values[row*column] and elements have to be stored in a row-wise order.
    The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
    
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    values - the values to be filled into the cells.
    
    Returns:
    this (for convenience only).
  - assign
```
public LongMatrix2D assign(long[][] values)
```
    Description copied from class: LongMatrix2D
    
    Sets all cells to the state specified by values. values is required to have the form values[row][column] and have exactly the same number of rows and columns as the receiver.
    The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
    
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    values - the values to be filled into the cells.
    
    Returns:
    this (for convenience only).
  - assign
```
public LongMatrix2D assign(LongMatrix2D source)
```
    Description copied from class: LongMatrix2D
    
    Replaces all cell values of the receiver with the values of another matrix. Both matrices must have the same number of rows and columns. If both matrices share the same cells (as is the case if they are views derived from the same matrix) and intersect in an ambiguous way, then replaces as if using an intermediate auxiliary deep copy of other.
    
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    source - the source matrix to copy from (may be identical to the receiver).
    
    Returns:
    this (for convenience only).
  - assign
```
public LongMatrix2D assign(LongMatrix2D y,
                  LongLongFunction function)
```
    Description copied from class: LongMatrix2D
    Assigns the result of a function to each cell; x[row,col] = function(x[row,col],y[row,col]).
    Example:
```
   // 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 
   16 729
 
 
```
    For further examples, see the package doc.
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    y - 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,
    
    Returns:
    this (for convenience only).
    See Also:
    LongFunctions
  - assign
```
public LongMatrix2D assign(LongMatrix2D y,
                  LongLongFunction function,
                  IntArrayList rowList,
                  IntArrayList columnList)
```
    Description copied from class: LongMatrix2D
    
    Assigns the result of a function to all cells with a given indexes
    
    Overrides:
    
    assign in class LongMatrix2D
    
    Parameters:
    y - 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.
    
    Returns:
    this (for convenience only).
    See Also:
    LongFunctions
  - cardinality
```
public int cardinality()
```
    Description copied from class: LongMatrix2D
    
    Returns the number of cells having non-zero values; ignores tolerance.
    
    Overrides:
    
    cardinality in class LongMatrix2D
    
    Returns:
    cardinality
  - elements
```
public long[] elements()
```
    Description copied from class: LongMatrix2D
    
    Returns the elements of this matrix.
    
    Specified by:
    
    elements in class LongMatrix2D
    
    Returns:
    the elements
  - forEachNonZero
```
public LongMatrix2D forEachNonZero(IntIntLongFunction function)
```
    Description copied from class: LongMatrix2D
    
    Assigns the result of a function to each non-zero cell; x[row,col] = function(x[row,col]). Use this method for fast special-purpose iteration. If you want to modify another matrix instead of this (i.e. work in read-only mode), simply return the input value unchanged. Parameters to function are as follows: first==row, second==column, third==nonZeroValue.
    
    Overrides:
    
    forEachNonZero in class LongMatrix2D
    
    Parameters:
    function - a function object taking as argument the current non-zero cell's row, column and value.
    
    Returns:
    this (for convenience only).
  - getRowMajor
```
public DenseLongMatrix2D getRowMajor()
```
    Returns a new matrix that has the same elements as this matrix, but they are addressed internally in row major. This method creates a new object (not a view), so changes in the returned matrix are NOT reflected in this matrix.
    
    Returns:
    this matrix with elements addressed internally in row major
  - getNegativeValues
```
public void getNegativeValues(IntArrayList rowList,
                     IntArrayList columnList,
                     LongArrayList valueList)
```
    Description copied from class: LongMatrix2D
    
    Fills the coordinates and values of cells having negative values into the specified lists. Fills into the lists, starting at index 0. After this call returns the specified lists all have a new size, the number of non-zero values.
    
    Overrides:
    
    getNegativeValues in class LongMatrix2D
    
    Parameters:
    rowList - 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.
  - getNonZeros
```
public void getNonZeros(IntArrayList rowList,
               IntArrayList columnList,
               LongArrayList valueList)
```
    Description copied from class: LongMatrix2D
    Fills the coordinates and values of cells having non-zero values into the specified lists. Fills into the lists, starting at index 0. After this call returns the specified lists all have a new size, the number of non-zero values.
    In 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.
    Overrides:
    
    getNonZeros in class LongMatrix2D
    
    Parameters:
    rowList - 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.
  - getPositiveValues
```
public void getPositiveValues(IntArrayList rowList,
                     IntArrayList columnList,
                     LongArrayList valueList)
```
    Description copied from class: LongMatrix2D
    
    Fills the coordinates and values of cells having positive values into the specified lists. Fills into the lists, starting at index 0. After this call returns the specified lists all have a new size, the number of non-zero values.
    
    Overrides:
    
    getPositiveValues in class LongMatrix2D
    
    Parameters:
    rowList - 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.
  - getQuick
```
public long getQuick(int row,
            int column)
```
    Description copied from class: LongMatrix2D
    
    Returns the matrix cell value at coordinate [row,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().
    
    Specified by:
    
    getQuick in class LongMatrix2D
    
    Parameters:
    row - the index of the row-coordinate.
    column - the index of the column-coordinate.
    
    Returns:
    the value at the specified coordinate.
  - index
```
public long index(int row,
         int column)
```
    Description copied from class: AbstractMatrix2D
    
    Returns the position of the given coordinate within the (virtual or non-virtual) internal 1-dimensional array.
    
    Overrides:
    
    index in class AbstractMatrix2D
    
    Parameters:
    row - the index of the row-coordinate.
    column - the index of the column-coordinate.
  - like
```
public LongMatrix2D like(int rows,
                int columns)
```
    Description copied from class: LongMatrix2D
    
    Construct and returns a new empty matrix of the same dynamic type as the receiver, having the specified number of rows and columns. For example, if the receiver is an instance of type DenseLongMatrix2D the new matrix must also be of type DenseLongMatrix2D, if the receiver is an instance of type SparseLongMatrix2D the new matrix must also be of type SparseLongMatrix2D, etc. In general, the new matrix should have internal parametrization as similar as possible.
    
    Specified by:
    
    like in class LongMatrix2D
    
    Parameters:
    rows - the number of rows the matrix shall have.
    columns - the number of columns the matrix shall have.
    
    Returns:
    a new empty matrix of the same dynamic type.
  - like1D
```
public LongMatrix1D like1D(int size)
```
    Description copied from class: LongMatrix2D
    
    Construct and returns a new 1-d matrix of the corresponding dynamic type, entirelly independent of the receiver. For example, if the receiver is an instance of type DenseLongMatrix2D the new matrix must be of type DenseLongMatrix1D, if the receiver is an instance of type SparseLongMatrix2D the new matrix must be of type SparseLongMatrix1D, etc.
    
    Specified by:
    
    like1D in class LongMatrix2D
    
    Parameters:
    size - the number of cells the matrix shall have.
    
    Returns:
    a new matrix of the corresponding dynamic type.
  - getMaxLocation
```
public long[] getMaxLocation()
```
    Description copied from class: LongMatrix2D
    
    Return the maximum value of this matrix together with its location
    
    Overrides:
    
    getMaxLocation in class LongMatrix2D
    
    Returns:
    maximum_value, row_location, column_location };
  - getMinLocation
```
public long[] getMinLocation()
```
    Description copied from class: LongMatrix2D
    
    Return the minimum value of this matrix together with its location
    
    Overrides:
    
    getMinLocation in class LongMatrix2D
    
    Returns:
    minimum_value, row_location, column_location};
  - setQuick
```
public void setQuick(int row,
            int column,
            long value)
```
    Description copied from class: LongMatrix2D
    
    Sets the matrix cell at coordinate [row,column] to the specified 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().
    
    Specified by:
    
    setQuick in class LongMatrix2D
    
    Parameters:
    row - the index of the row-coordinate.
    column - the index of the column-coordinate.
    value - the value to be filled into the specified cell.
  - toArray
```
public long[][] toArray()
```
    Description copied from class: LongMatrix2D
    
    Constructs and returns a 2-dimensional array containing the cell values. The returned array values has the form values[row][column] and has the same number of rows and columns as the receiver.
    The values are copied. So subsequent changes in values are not reflected in the matrix, and vice-versa.
    
    Overrides:
    
    toArray in class LongMatrix2D
    
    Returns:
    an array filled with the values of the cells.
  - vectorize
```
public LongMatrix1D vectorize()
```
    Description copied from class: LongMatrix2D
    
    Returns a vector obtained by stacking the columns of the matrix on top of one another.
    
    Specified by:
    
    vectorize in class LongMatrix2D
    
    Returns:
    a vector of columns of this matrix.
  - zSum
```
public long zSum()
```
    Description copied from class: LongMatrix2D
    
    Returns the sum of all cells; Sum( x[i,j] ).
    
    Overrides:
    
    zSum in class LongMatrix2D
    
    Returns:
    the sum.

Class DenseColumnLongMatrix2D

Constructor Summary

Method Summary

Methods inherited from class cern.colt.matrix.tlong.LongMatrix2D

Methods inherited from class cern.colt.matrix.AbstractMatrix2D

Methods inherited from class cern.colt.matrix.AbstractMatrix

Methods inherited from class cern.colt.PersistentObject

Methods inherited from class java.lang.Object

Constructor Detail

DenseColumnLongMatrix2D

DenseColumnLongMatrix2D

DenseColumnLongMatrix2D

DenseColumnLongMatrix2D

Method Detail

aggregate

aggregate

aggregate

aggregate

assign

assign

assign

assign

assign

assign

assign

assign

assign

cardinality

elements

forEachNonZero

getRowMajor

getNegativeValues

getNonZeros

getPositiveValues

getQuick

index

like

like1D

getMaxLocation

getMinLocation

setQuick

toArray

vectorize

zSum