Matrix class

The Matrix class

Most of the class code is not optimized for high performance but for readability. You should be able to read the functions and understand what is going on with basic linear algebra knowledge.

For more reading see the page about Matrix Math at Wikipedia(Matrix

final Matrix a = Matrix([[1, 2], [3, 4]]);
final Vector b = Vector.column([2, 3]);
final Matrix e = Matrix([[8], [18]]);
Matrix result = a * b;
print(result);
print(result == e);

This prints

[[8.0], [18.0]]
true

Constructors

Matrix.new(List<List<double>> _values)
Constructs a matrix from a List<List
Matrix.eye(int size)
Constructs an identity matrix of size
Matrix.fill(int m, int n, [double fill = 0.0])
Constructs a mxn (rows x cols) Matrix fill with fill=0.0.

Properties

hashCode → int
Returns the hashCode for the matrix.
no setteroverride
m → int
Returns the number of rows
no setter
n → int
Returns the number of columns
no setter
runtimeType → Type
A representation of the runtime type of the object.
no setterinherited

Methods

coFactors() → Matrix
Calculates the Cofactors of the matrix.
columnVector(int column) → Vector
Returns a column from the matrix as a vector.
copy() → Matrix
Returns a deep copy of the Matrix.
cut(int m, int n) → Matrix
Cuts the given column m and row n from the matrix and returns the remainder.
det() → double
Calculates the determinant of the matrix.
inverse() → Matrix
Calculates the matrix inverse.
map(MatrixMapFunc f) → Matrix
Calls f for each element in the matrix and stores the result in a new matrix.
noSuchMethod(Invocation invocation) → dynamic
Invoked when a nonexistent method or property is accessed.
inherited
rowVector(int row, [bool deepCopy = true]) → Vector
Returns a row from the matrix as a vector.
toString() → String
Prints the content of the matrix.
override
toVector([bool deepCopy = true]) → Vector
Returns the Vector representation of this Matrix if one of it's dimensions is 1.
trace() → double
Calculates the trace of the Matrix.
transpose() → Matrix
Transposes the matrix

Operators

operator *(dynamic other) → Matrix
Multiply an Matrix with a Matrix or a scalar
operator +(Matrix other) → Matrix
Add two matrices of same dimensions.
operator -(Matrix other) → Matrix
Subtract two matrices of same dimensions.
operator ==(dynamic other) → bool
Equality check for each element in the matrix.
override
operator [](int m) → List<double>
Access a row of data from the matrix
operator ~() → Matrix
Negate all values