1549.sagews

N=10
pop_size=[]
lam=1.2

for t in range(10):
    pop_size.append([t,N])
    N=N*lam
points(pop_size)

line??

File: /usr/local/sage2/local/lib/python2.6/site-packages/sage/plot/line.py

Source Code (starting at line 226):

def line(points, **kwds):
    """
    Returns either a 2-dimensional or 3-dimensional line depending
    on value of points.

    For information regarding additional arguments, see either line2d?
    or line3d?.

    EXAMPLES::

        sage: line([(0,0), (1,1)])
        sage: line([(0,0,1), (1,1,1)])
    """
    try:
        return line2d(points, **kwds)
    except ValueError:
        from sage.plot.plot3d.shapes2 import line3d
        return line3d(points, **kwds)

from random import gauss
def exponential (N, r):
    return N * (r + gauss(0,0.5))
    
time = 100.
n0 = 100
pop_sizes = [n0]

for years in range(1, time):
    pop_sizes.append(exponential(pop_sizes[-1], 1.1))
    
series = []
for p in range(len(pop_sizes)):
    series.append([p, pop_sizes[p]])
    
line(series, marker='.') + text('time', (50,-150), color 'black')