Method __mul__

linear-algebra-python/src/lib.py:327–354

implements the matrix-vector multiplication. implements the matrix-scalar multiplication

(self, other)

        return self.__height

    def __mul__(self, other):
        """
        implements the matrix-vector multiplication.
        implements the matrix-scalar multiplication
        """
        if isinstance(other, Vector):  # vector-matrix
            if other.size() == self.__width:
                ans = zeroVector(self.__height)
                for i in range(self.__height):
                    summe = 0
                    for j in range(self.__width):
                        summe += other.component(j) * self.__matrix[i][j]
                    ans.changeComponent(i, summe)
                    summe = 0
                return ans
            else:
                raise Exception(
                    "vector must have the same size as the "
                    + "number of columns of the matrix!"
                )
        elif isinstance(other, int) or isinstance(other, float):  # matrix-scalar
            matrix = []
            for i in range(self.__height):
                row = []
                for j in range(self.__width):
                    row.append(self.__matrix[i][j] * other)
                matrix.append(row)
            return Matrix(matrix, self.__width, self.__height)

    def __add__(self, other):
        """