George What 'magic' ? The (x,y,z) notation is used only for 3D
George vectors. (x,y) is also common for 2D and perhaps (t,x,y,z) for
George 4D, with t for time.
Don't forget (w,x,y,z) for quaternions...
Skip
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I know its been done before, but I'm hacking away on a simple Vector
class.
class Vector(tuple):
def __add__(self, b):
return Vector([x+y for x,y in zip(self, b)])
def __sub__(self, b):
return Vector([x-y for x,y in zip(self, b)])
def __div__(self, b):
return
class Vector(tuple):
... x = property(lambda self: self[0])
... y = property(lambda self: self[1])
... z = property(lambda self: self[2])
...
Vector(abc)
('a', 'b', 'c')
Vector(abc).z
'c'
Vector(abc)[2]
'c'
Aha! You have simultaneously proposed a neat solution, and
[EMAIL PROTECTED] wrote:
I know its been done before, but I'm hacking away on a simple Vector
class.
class Vector(tuple):
def __add__(self, b):
return Vector([x+y for x,y in zip(self, b)])
def __sub__(self, b):
return Vector([x-y for x,y in zip(self, b)])
def
[EMAIL PROTECTED]
I know its been done before, but I'm hacking away on a simple Vector
class. [...] However, I'd like to add attribute access (magically),
so I can do this: [...] Has anyone got any ideas on how this might be
done?
I needed something this last week, while toying with
And what should happen for vectors of size != 3 ? I don't think that a
general purpose vector class should allow it; a Vector3D subclass would
be more natural for this.
That's the 'magic' good idea I'm looking for. I think a unified Vector
class for all size vectors is a worthy goal!
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[EMAIL PROTECTED] wrote
And what should happen for vectors of size != 3 ? I don't think that a
general purpose vector class should allow it; a Vector3D subclass would
be more natural for this.
That's the 'magic' good idea I'm looking for. I think a unified Vector
class for all size
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):
