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SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object lejos.math.Matrix
public class Matrix
Constructor Summary | |
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Matrix(double[][] A)
Construct a matrix from a 2-D array. |
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Matrix(double[][] A,
int m,
int n)
Construct a matrix quickly without checking arguments. |
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Matrix(double[] vals,
int m)
Construct a matrix from a one-dimensional packed array |
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Matrix(int m,
int n)
Construct an m-by-n matrix of zeros. |
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Matrix(int m,
int n,
double s)
Construct an m-by-n constant matrix. |
Method Summary | |
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Matrix |
arrayLeftDivide(Matrix B)
Element-by-element left division, C = A.\B |
Matrix |
arrayLeftDivideEquals(Matrix B)
Element-by-element left division in place, A = A.\B |
Matrix |
arrayRightDivide(Matrix B)
Element-by-element right division, C = A./B |
Matrix |
arrayRightDivideEquals(Matrix B)
Element-by-element right division in place, A = A./B |
Matrix |
arrayTimes(Matrix B)
Element-by-element multiplication, C = A.*B |
Matrix |
arrayTimesEquals(Matrix B)
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Object |
clone()
Clone the Matrix object. |
static Matrix |
constructWithCopy(double[][] A)
Construct a matrix from a copy of a 2-D array. |
Matrix |
copy()
Make a deep copy of a matrix |
double |
get(int i,
int j)
Get a single element. |
double[][] |
getArray()
Access the internal two-dimensional array. |
double[][] |
getArrayCopy()
Copy the internal two-dimensional array. |
int |
getColumnDimension()
Get column dimension. |
double[] |
getColumnPackedCopy()
Make a one-dimensional column packed copy of the internal array. |
Matrix |
getMatrix(int[] r,
int[] c)
Get a submatrix. |
Matrix |
getMatrix(int[] r,
int j0,
int j1)
Get a submatrix. |
Matrix |
getMatrix(int i0,
int i1,
int[] c)
Get a submatrix. |
Matrix |
getMatrix(int i0,
int i1,
int j0,
int j1)
Get a submatrix. |
int |
getRowDimension()
Get row dimension. |
double[] |
getRowPackedCopy()
Make a one-dimensional row packed copy of the internal array. |
static Matrix |
identity(int m,
int n)
Generate identity matrix |
Matrix |
minus(Matrix B)
C = A - B |
Matrix |
minusEquals(Matrix B)
A = A - B |
double |
norm1()
One norm |
double |
normF()
Frobenius norm |
double |
normInf()
Infinity norm |
Matrix |
plus(Matrix B)
C = A + B |
Matrix |
plusEquals(Matrix B)
A = A + B |
static Matrix |
random(int m,
int n)
Generate matrix with random elements |
void |
set(int i,
int j,
double s)
Set a single element. |
void |
setMatrix(int[] r,
int[] c,
Matrix X)
Set a submatrix. |
void |
setMatrix(int[] r,
int j0,
int j1,
Matrix X)
Set a submatrix. |
void |
setMatrix(int i0,
int i1,
int[] c,
Matrix X)
Set a submatrix. |
void |
setMatrix(int i0,
int i1,
int j0,
int j1,
Matrix X)
Set a submatrix. |
Matrix |
times(double s)
Multiply a matrix by a scalar, C = s*A |
Matrix |
times(Matrix B)
Linear algebraic matrix multiplication, A * B |
Matrix |
timesEquals(double s)
Multiply a matrix by a scalar in place, A = s*A |
double |
trace()
Matrix trace. |
Matrix |
transpose()
Matrix transpose. |
Matrix |
uminus()
Unary minus |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public Matrix(int m, int n)
m
- Number of rows.n
- Number of colums.public Matrix(int m, int n, double s)
m
- Number of rows.n
- Number of colums.s
- Fill the matrix with this scalar value.public Matrix(double[][] A) throws Exception
A
- Two-dimensional array of doubles.
IllegalArgumentException
- All rows must have the same length
Exception
constructWithCopy(double[][])
public Matrix(double[][] A, int m, int n)
A
- Two-dimensional array of doubles.m
- Number of rows.n
- Number of colums.public Matrix(double[] vals, int m) throws IllegalArgumentException
vals
- One-dimensional array of doubles, packed by columns (ala Fortran).m
- Number of rows.
IllegalArgumentException
- Array length must be a multiple of m.Method Detail |
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public static Matrix constructWithCopy(double[][] A) throws IllegalArgumentException
A
- Two-dimensional array of doubles.
IllegalArgumentException
- All rows must have the same lengthpublic Matrix copy()
public Object clone()
clone
in class Object
public double[][] getArray()
public double[][] getArrayCopy()
public double[] getColumnPackedCopy()
public double[] getRowPackedCopy()
public int getRowDimension()
public int getColumnDimension()
public double get(int i, int j)
i
- Row index.j
- Column index.
public Matrix getMatrix(int i0, int i1, int j0, int j1) throws ArrayIndexOutOfBoundsException
i0
- Initial row indexi1
- Final row indexj0
- Initial column indexj1
- Final column index
ArrayIndexOutOfBoundsException
- Submatrix indicespublic Matrix getMatrix(int[] r, int[] c) throws Exception
r
- Array of row indices.c
- Array of column indices.
ArrayIndexOutOfBoundsException
- Submatrix indices
Exception
public Matrix getMatrix(int i0, int i1, int[] c) throws Exception
i0
- Initial row indexi1
- Final row indexc
- Array of column indices.
ArrayIndexOutOfBoundsException
- Submatrix indices
Exception
public Matrix getMatrix(int[] r, int j0, int j1) throws Exception
r
- Array of row indices.j0
- Initial column indexj1
- Final column index
ArrayIndexOutOfBoundsException
- Submatrix indices
Exception
public void set(int i, int j, double s)
i
- Row index.j
- Column index.s
- A(i,j).
ArrayIndexOutOfBoundsException
public void setMatrix(int i0, int i1, int j0, int j1, Matrix X) throws Exception
i0
- Initial row indexi1
- Final row indexj0
- Initial column indexj1
- Final column indexX
- A(i0:i1,j0:j1)
ArrayIndexOutOfBoundsException
- Submatrix indices
Exception
public void setMatrix(int[] r, int[] c, Matrix X) throws Exception
r
- Array of row indices.c
- Array of column indices.X
- A(r(:),c(:))
ArrayIndexOutOfBoundsException
- Submatrix indices
Exception
public void setMatrix(int[] r, int j0, int j1, Matrix X) throws Exception
r
- Array of row indices.j0
- Initial column indexj1
- Final column indexX
- A(r(:),j0:j1)
ArrayIndexOutOfBoundsException
- Submatrix indices
Exception
public void setMatrix(int i0, int i1, int[] c, Matrix X) throws Exception
i0
- Initial row indexi1
- Final row indexc
- Array of column indices.X
- A(i0:i1,c(:))
ArrayIndexOutOfBoundsException
- Submatrix indices
Exception
public Matrix transpose()
public double norm1()
public double normInf()
public double normF()
public Matrix uminus()
public Matrix plus(Matrix B)
B
- another matrix
public Matrix plusEquals(Matrix B)
B
- another matrix
public Matrix minus(Matrix B)
B
- another matrix
public Matrix minusEquals(Matrix B)
B
- another matrix
public Matrix arrayTimes(Matrix B)
B
- another matrix
public Matrix arrayTimesEquals(Matrix B)
public Matrix arrayRightDivide(Matrix B)
B
- another matrix
public Matrix arrayRightDivideEquals(Matrix B)
B
- another matrix
public Matrix arrayLeftDivide(Matrix B)
B
- another matrix
public Matrix arrayLeftDivideEquals(Matrix B)
B
- another matrix
public Matrix times(double s)
s
- scalar
public Matrix timesEquals(double s)
s
- scalar
public Matrix times(Matrix B) throws Exception
B
- another matrix
IllegalArgumentException
- Matrix inner dimensions must agree.
Exception
public double trace()
public static Matrix random(int m, int n)
m
- Number of rows.n
- Number of colums.
public static Matrix identity(int m, int n)
m
- Number of rows.n
- Number of colums.
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