1631.sagews

#Madison Schaeffer

# -*- coding: utf-8 -*-
# import libraries
from math import exp
import matplotlib.pyplot as plt
from random import uniform

#define functions
def cont_log_time(N,r,K):
    return N + N*r*(1-(N/K))

# declare data
N = 100
r = 3.0
K = 1000
time = 50
pop_size = [N]
pop_sizeY=[]

# main
for years in range(1,time):
    pop_size.append(cont_log_time(pop_size[-1], r, K))

for values in range(len(pop_size)-1):
    pop_sizeY.append(pop_size[values+1])

pop_size.pop(-1)
plt.plot(pop_size,pop_sizeY)
plt.show() # [Mike] Minor point, Can you plot without 
           #        the lines connecting the dots?
           
#plot with no lines:

#pop_size.pop(-1)
#plt.plot(pop_size,pop_sizeY, marker = '.',linestyle = 'none')
#plt.show()

No object 'dots' currently defined.