automatically assigning names to indexes
Devan L
devlai at gmail.com
Tue Jul 12 16:27:55 EDT 2005
import math
class Vector:
def __init__(self, coordinates):
self.coordinates = coordinates
self.magnitude = sum([c**2 for c in coordinates])**0.5
self.direction = getangle(Vector([1]+[0 for i in
range(len(coordinates)-1)]))
def dotproduct(self, vector):
sum([a*b for a,b in zip(self.coordinates,vector.coordinates)])
def crossproduct(self, vector, pvector):
return
pvector*self.magnitude*vector.magnitude*math.sin(self.getangle(vector))
def getangle(self, vector):
return
math.acos(self.dotproduct(vector)/(self.magnitude*vector.magnitude))
def __mul__(self, scalar):
return Vector([c*scalar for c in self.coordinates])
def __add__(self, vector):
return Vector([c+d for c,d in
zip(self.coordinates,vector.coordinates)])
def __sub__(self, vector):
return Vector([c-d for c,d in
zip(self.coordinates,vector.coordinates)])
What about this?
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