Plot of function not showing up when called-CodePudding

I'm trying to use the following code to plot the function p_n which is a function of N:

import matplotlib.pyplot as plt

def factorial(N):
    fact = 1
    for num in range(2, N   1):
        fact *= num
    return fact


a=1/(2**N)
b=factorial(N)
c=factorial(N-25)
d=factorial(25)

p_n=a*((b)/(c*d))

y = p_n
x = N
plt.title("Factorial Graph")
plt.xlabel("x axis")
plt.ylabel("y axis")
plt.plot(x, y, color="blue")
plt.show()

When I run this code, I just get a blank screen. I'm not sure why this is happening.

CodePudding user response：

As other users have commented, x and y are single values as yo uhave defined them.

I would recommend defining p_n as a function, and using list comprehension or arrays for x and y. For example;

def p_n(N):
    a=1/(2**N)
    b=factorial(N)
    c=factorial(N-25)
    d=factorial(25)
    return a*((b)/(c*d))

N = 10
x = list(range(N))
y = [p_n(x_val) for x_val in x]

Then pass x and y to plt.plot(...) as you did before. You should get the following result: