# How do we graph sequences

For example def agen(max=Infinity): n = 1 an = 1 while n <= max: yield an n += 1 an = (an + 1)/an^2

a = agen(10) for i in a: print i.n() The above print the sequence, but how do I graph it.

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Simpler

A = [(-1)^n/n for n in range(1,20)]
list_plot(A)

more tl; dr

point2d(enumerate(agen(10),1))


Here is one possibility. Suppose A contains the terms of the sequence and we assume they are labelled starting at 1.

A = [(-1)^n/n for n in range(1,20)]
pts = [(i,ai) for i,ai in enumerate(A,1)]
point2d(pts)


The idea is to construct a list of points that consists of ordered pairs $(i,a_{i})$ to be sent as an argument to point2d.

In your case you may be able to construct A as follows:

A = [ai for ai in agen(10)]


Perhaps you could skip that part and directly construct the list of points:

pts = [(i,ai) for i,ai in enumerate(agen(10),1)]


If we are confident enough, then we may just skip all steps and arrive at:

point2d(enumerate(agen(10),1))

more

Feel free to upvote/accept answers if you found them useful.