starfish.core.solver

Class Matrix

java.lang.Object

starfish.core.solver.Matrix

public class Matrix
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.List<java.util.HashMap<java.lang.Integer,java.lang.Double>>	data
int	nr

Constructor Summary

Constructors

Constructor and Description
Matrix(int nr) sparse matrix constructor

Method Summary

Modifier and Type	Method and Description
void	add(int i, int j, double val) add value to row r, column c in full matri
void	clearRow(int i) clears (sets to zero) a single ro
static Matrix	copy(Matrix A) copy constructor
void	copyRow(Matrix A, int i) copies single row between matrixe
Matrix[]	decomposeLU()
Matrix	diag_matrix() returns a new matrix which is the diagonal of the specified on
double[]	diag(Matrix A) returns a vector containing the diagona
double	get(int i, int j) returns the value held by full matrix at row i and column
Matrix	identity() returns the identity matrix of size of
Matrix	inverse() returns the inverse NOTE: this is currently defined only for diagonal matrix!
static Matrix	makeTransformationMatrix(double[] scaling, double theta, double[] translation) creates 2D transformation matrix M = T*R*S
double[]	mult(double[] x) performs matrix vector multiplication
void	mult(double[] x, double[] result) performs matrix vector multiplication and stores it in result vector
void	mult(int i, int j, double val) multiplies value held in full matrix row i, column j, by valu
Matrix	mult(Matrix A) performs matrix matrix multiplication
void	multRow(int i, double s) multiplies entire row by
double	multRowNonDiag(double[] x, int i) multiplies one row of the matrix by a vector but excludes the diagonal element
void	print() prints self
void	set(int i, int j, double val) sets value at row i, column j in full matri
void	subtract(int i, int j, double val) add value to row r, column c in full matri
Matrix	subtract(Matrix B) returns A-
Matrix	subtractDiag(double[] b) returns A-diag(B), for now defined only for identical matrices (nv is equal
Matrix	transpose() returns the transpose

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

data

protected java.util.List<java.util.HashMap<java.lang.Integer,java.lang.Double>> data

nr

public final int nr

Constructor Detail

Matrix

public Matrix(int nr)

sparse matrix constructor

Parameters:

nr -

Method Detail

copy

public static Matrix copy(Matrix A)

copy constructor

Parameters:

A -

Returns:

clearRow

public void clearRow(int i)

clears (sets to zero) a single ro

Parameters:

iw -

get

public double get(int i,
                  int j)

returns the value held by full matrix at row i and column

Parameters:

i -

jj -

Returns:

set

public void set(int i,
                int j,
                double val)

sets value at row i, column j in full matri

Parameters:

i -

jx -

val -

add

public void add(int i,
                int j,
                double val)

add value to row r, column c in full matri

Parameters:

i -

jx -

val -

copyRow

public void copyRow(Matrix A,
                    int i)

copies single row between matrixe

Parameters:

A -

is -

subtract

public void subtract(int i,
                     int j,
                     double val)

add value to row r, column c in full matri

Parameters:

i -

jx -

val -

subtract

public Matrix subtract(Matrix B)

returns A-

Parameters:

BB -

Returns:

subtractDiag

public Matrix subtractDiag(double[] b)

returns A-diag(B), for now defined only for identical matrices (nv is equal

Parameters:

b -

Returns:

)

mult

public Matrix mult(Matrix A)

performs matrix matrix multiplication

Parameters:

A - matrix to multiply by

Returns:

R=M*A

mult

public double[] mult(double[] x)

performs matrix vector multiplication

Parameters:

x -

Returns:

A*x

mult

public void mult(double[] x,
                 double[] result)

performs matrix vector multiplication and stores it in result vector

Parameters:

x -

result -

mult

public void mult(int i,
                 int j,
                 double val)

multiplies value held in full matrix row i, column j, by valu

Parameters:

i -

j -

vale -

multRow

public void multRow(int i,
                    double s)

multiplies entire row by

Parameters:

is -

s -

multRowNonDiag

public double multRowNonDiag(double[] x,
                             int i)

multiplies one row of the matrix by a vector but excludes the diagonal element

Parameters:

x -

i -

Returns:

identity

public Matrix identity()

returns the identity matrix of size of

Returns:

A

diag_matrix

public Matrix diag_matrix()

returns a new matrix which is the diagonal of the specified on

Returns:

e

diag

public double[] diag(Matrix A)

returns a vector containing the diagona

Parameters:

A -

Returns:

l

inverse

public Matrix inverse()

returns the inverse NOTE: this is currently defined only for diagonal matrix!

Returns:

transpose

public Matrix transpose()

returns the transpose

Returns:

print

public void print()

prints self

makeTransformationMatrix

public static Matrix makeTransformationMatrix(double[] scaling,
                                              double theta,
                                              double[] translation)

creates 2D transformation matrix M = T*R*S

Parameters:

scaling -

theta -

translation -

Returns:

decomposeLU

public Matrix[] decomposeLU()
                     throws java.lang.UnsupportedOperationException

Returns:

Throws:

java.lang.UnsupportedOperationException