Ok, so while practicing python, plotting and quadratic equations - I found this weird behaviour in plotting.
The function 'func' defines one of the solution to a quadratic equation. The solution being 0.5(x+1 - sqrt((x+1)^2 - 4x))
And so I tried plotting this value against different x values. I get something similar to this -> Click Here
A friend pointed out that the solution actually reduces to 1.0 - therefore the plot should be a horizontal line passing through y at 1.0
Obviously that is not what I'm getting.
Can someone please explain why I'm getting a weird plot? Thanks in advance! :)
import matplotlib.pyplot as plt
from math import *
def func(x):
B = x + 1.0
C = x
y = 0.5 * (B - sqrt(B ** 2 - 4 * C))
return y
def frange(start, stop, step):
i = start
while i < stop:
yield i
i += step
x = []
y = []
for i in frange(0.0, 2.0, 0.01):
x.append(i)
y.append(func(i))
plt.scatter(x, y)
plt.show()
