Question

can anyone help me run this code properly?
when i test it, the code spits out obserd awnsers such as sqrtbi(9, 0.0001) = 2.25... instead of 3, how can i count on it to find the square root of any given number?

Answer 1

def sqrtbi(x, z):
assert x>=0, 'x must be non-negitive, not' + str(x)
assert z > 0, 'espilon must be positive, not' + str(z)
low = 0
high = max(x, 1.0)
guess = (low + high)/2.0
ctr = 1
while abs(guess**2 - x) > z and ctr <= 100:
#print 'low:', low, 'high:', high, 'guess:', guess
if guess**2 < x:
low = guess
else:
high = guess
guess = (low + high)/2.0
ctr += 1
assert ctr <= 100, 'Ineration count exceeded'
print 'Bi method. Num. Interactios', ctr, 'Estimation', guess
return guess

Answer 2

sqrtbi(9.0, 0.01): Bi method. Num. Interactios 11 Estimation 3.00146484375
And maybe I'm a little psychotic, but I say it one more time, please use a pastebin to make it easy for us to copy the code. And no need to start a new question, you'd better take into account the answers given to the other one.

Answer 3

you got it dude

Answer 4

http://en.wikipedia.org/wiki/Pastebin
Thx for the code, but because I'm a good guy, I reformatted it myself. And tested it too:
sqrtbi(9.0, 0.00001) -> Bi method. Num. Interactios 21 Estimation 3.00000143051

Answer 5

lol i understand now... I reformatted your code too well sorry. If you look at the return statement, it is inside the while loop. It should be after the loop, like this: http://pastebin.com/8H6YW4Kn

Answer 6

haha THANK YOU!!!!!