Class Vector

linear-algebra-python/src/lib.py:27–195

This class represents a vector of arbitray size. You need to give the vector components. Overview about the methods: constructor(components : list) : init the vector set(components : list) : changes the vector components. __str__() : toString method component(i : int):

class Vector(object):
    """
    This class represents a vector of arbitray size.
    You need to give the vector components.

    Overview about the methods:

    constructor(components : list) : init the vector
    set(components : list) : changes the vector components.
    __str__() : toString method
    component(i : int): gets the i-th component (start by 0)
    size() : gets the size of the vector (number of components)
    euclidLength() : returns the eulidean length of the vector.
    operator + : vector addition
    operator - : vector subtraction
    operator * : scalar multiplication and dot product
    copy() : copies this vector and returns it.
    changeComponent(pos,value) : changes the specified component.
    TODO: compare-operator
    """

    def __init__(self, components):
        """
        input: components or nothing
        simple constructor for init the vector
        """
        self.__components = components

    def set(self, components):
        """
        input: new components
        changes the components of the vector.
        replace the components with newer one.
        """
        if len(components) > 0:
            self.__components = components
        else:
            raise Exception("please give any vector")

    def __str__(self):
        """
        returns a string representation of the vector
        """
        ans = "("
        length = len(self.__components)
        for i in range(length):
            if i != length - 1:
                ans += str(self.__components[i]) + ","
            else:
                ans += str(self.__components[i]) + ")"
        if len(ans) == 1:
            ans += ")"
        return ans

    def component(self, i):
        """
        input: index (start at 0)
        output: the i-th component of the vector.