I have a list of points in the form of
points=[(x1,y1),...(xn,yn)...]
I am looking for a pythonic way to transform the list into
x=[x1,...xn] y=[y1,...yn]
One way to do it would be
x = map (lambda x: x[1],points)
However, maybe there is a more pythonic way to directly draw from "points" mentioned above?
You can do something like this:
x = []
y = []
for point in points:
x.append(point[0])
y.append(point[1])
or:
x,y = [i[0] for i in points], [i[1] for i in points]
but the best way is to use zip:
x,y = zip(*points)
zip is better than map and it is faster, you should define a function in map with lambda. so I think the best way to do this is with zip.
In addition to mehrdad-pedramfar answer:
If using numpy is not a problem you can convert your list of tuples to a numpy array and then just use indexing.
import numpy as np
short_example = np.array([(1,2),(2,4),(4,6)])
short_example[:,0]
gives a numpy array of all x values:
array([1, 2, 4])
short_example[:,1]
gives a numpy array of all y values:
array([2, 4, 6])
