Class Matrix

linear-algebra-python/src/lib.py:255–399

class: Matrix This class represents a arbitrary matrix. Overview about the methods: __str__() : returns a string representation operator * : implements the matrix vector multiplication implements the matrix-scalar multiplication.

class Matrix(object):
    """
    class: Matrix
    This class represents a arbitrary matrix.

    Overview about the methods:

         __str__() : returns a string representation
           operator * : implements the matrix vector multiplication
                        implements the matrix-scalar multiplication.
           changeComponent(x,y,value) : changes the specified component.
           component(x,y) : returns the specified component.
           width() : returns the width of the matrix
           height() : returns the height of the matrix
           operator + : implements the matrix-addition.
           operator - _ implements the matrix-subtraction
    """

    def __init__(self, matrix, w, h):
        """
        simple constructor for initialzes
        the matrix with components.
        """
        self.__matrix = matrix
        self.__width = w
        self.__height = h

    def __str__(self):
        """
        returns a string representation of this
        matrix.
        """
        ans = ""
        for i in range(self.__height):
            ans += "|"
            for j in range(self.__width):
                if j < self.__width - 1:
                    ans += str(self.__matrix[i][j]) + ","
                else:
                    ans += str(self.__matrix[i][j]) + "|\n"
        return ans

    def changeComponent(self, x, y, value):
        """
        changes the x-y component of this matrix
        """
        if x >= 0 and x < self.__height and y >= 0 and y < self.__width:
            self.__matrix[x][y] = value
        else:
            raise Exception("changeComponent: indices out of bounds")

    def component(self, x, y):
        """
        returns the specified (x,y) component
        """
        if x >= 0 and x < self.__height and y >= 0 and y < self.__width:
            return self.__matrix[x][y]
        else: