public class Matrix
extends java.lang.Object
Constructor and Description |
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Matrix(int dimension)
create a square matrix initialized to the identity
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Matrix(int rows,
int cols)
create a matrix of any dimensions initialized to all zeroes.
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Matrix(Matrix M)
Creates a matrix of a matrix...a copy
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Modifier and Type | Method and Description |
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Matrix |
add(Matrix M2)
Adds two matrices together
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static void |
add(Matrix r1,
double a)
Adds a constant to each element of this matrix
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static Matrix |
add(Matrix M1,
Matrix M2)
Static method to add any two matrices
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double |
cell(int i,
int j)
return the value in this matrix located at the ith row and jth column
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int |
cols()
Get the number of columns in this matrix
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static double |
det(double d1,
double d2,
double d3,
double d4)
Solves the determinate of this 2x2 matrix
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static Matrix |
inversMat3x3(Matrix in)
Given a 3 x 3 matrix and using Determinats to solve for inverse
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Matrix |
mult(double a)
scales a matrix, but does not destroy the content of the original
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Matrix |
mult(Matrix M2)
Multiplies 2 matrixes together
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static Matrix |
mult(Matrix M1,
Matrix M2)
multiplies two matrixes together
None Destructive
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void |
multSelf(double a)
Scalar multiply in place
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static double[] |
multVec(Matrix A,
double[] x)
Performs Ax multiplication
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void |
print()
Prints the content of a matrix to standard out
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void |
replace(Matrix M)
copy each cell from M to this.data
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int |
rows()
Gets the number of rows in this matrix
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void |
setCell(int i,
int j,
double value)
set the value of the cell at the ith row and jth column to value
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Matrix |
subtract(Matrix M2)
Subtracts a matrix from this
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static Matrix |
subtract(Matrix M1,
Matrix M2)
static Subtraces M2 from M1 5 = 8 - 3
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static Matrix |
transpose(Matrix in)
Makes a transpose of the input matrix
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public Matrix(int dimension)
dimension
- - size to make a square matrixpublic Matrix(int rows, int cols)
rows
- cols
- public Matrix(Matrix M) throws MatrixException
M
- - matrix to copyMatrixException
public void replace(Matrix M) throws MatrixException
Replaces the value of this...destructive copy
to just get a copy of a matrix
Matrix mm33 is a matrix initialized to some value
Matrix inv = Matrix.inverseMxM(mm33);
This makes a copy of mm33 into inv. mm33 is not altered in this process.
M
- - matrix to copyMatrixException
public int cols()
public int rows()
public double cell(int i, int j) throws MatrixException
Should have made this getCell, but I got too far along to make all the changes....
i
- - rowj
- - columnMatrixException
public void setCell(int i, int j, double value) throws MatrixException
i
- - rowj
- - columnvalue
- - the double to put in the cell (i,j)MatrixException
public Matrix add(Matrix M2) throws MatrixException
non-destructive
M2
- - what to add to thisMatrixException
public static void add(Matrix r1, double a) throws java.lang.Exception
r1
- - the matrix to receve the additiona
- - the vlaue to ad to each cell of the matrixjava.lang.Exception
public static Matrix add(Matrix M1, Matrix M2) throws MatrixException
M1
- M2
- MatrixException
public Matrix subtract(Matrix M2) throws MatrixException
non-destructive
M2
- MatrixException
public static Matrix subtract(Matrix M1, Matrix M2) throws MatrixException
M1
- - subtraced from matrix (the 8 in the above)M2
- - what is subtracte (the 3 in the above)MatrixException
public Matrix mult(double a) throws MatrixException
Non-destructive multiply
a
- - the scalarMatrixException
public static Matrix transpose(Matrix in) throws MatrixException
rows become columns
Row 1 is now column 1
Row 2 is now column 2
Row n is now column n
in
- - input matrixMatrixException
public static double[] multVec(Matrix A, double[] x) throws MatrixException
A
- x
- MatrixException
public void multSelf(double a)
Destructive multiply
a
- public Matrix mult(Matrix M2) throws MatrixException
3x1 * 1x3 = 3x3
None Destructive
M2
- MatrixException
public static Matrix mult(Matrix M1, Matrix M2) throws MatrixException
M1
- left hand sideM2
- right hand sideMatrixException
public void print() throws MatrixException
MatrixException
public static Matrix inversMat3x3(Matrix in) throws MatrixException
in
- - input 3x3 matrixMatrixException
public static double det(double d1, double d2, double d3, double d4)
d1
- - a11d2
- - a12d3
- - a21d4
- - a22