Can anyone tell me why i can't compare the value of a function and a float/number.

Question

# Everything is fine except 7th line from last...it is showing that type error.

def get_y(m, b, x):
y = m*x + b
return y

#Write your calculate_error function here

def calculate_error(m,b,point):
x_point =point[0]
y_point =point[1]
return abs(get_y(m,b,x_point) - y_point)

datapoints = [(1, 2), (2, 0), (3, 4), (4, 4), (5, 3)]

#Write your calculate_all_errodr function here

def calculate_all_error(m,b,points):
k=0
for z in points:
calculate_error(m,b,z)
k=k+calculate_error(m,b,z)
return k

possible_ms = a=[-10 + 0.1 * x for x in range(int((10-(-10))/0.1)+1)]
possible_bs = a=[-10 + 0.1 * x for x in range(int((20-(-20))/0.1)+1)]

smallest_error=float("inf")
best_m=0
best_b=0
for m in possible_ms:
for b in possible_bs:
if calculate_all_error(m,b,datapoints) < smallest_error:
best_m=m
best_b=b
smallest_error=calculate_all_error
print(best_m)
print(best_b)
print(smallest_error)

Answer 1

I think this causing error :
You are assigning function pointer to smallest_error in
smallest_error=calculate_all_error

It may
smallest_error=calculate_all_error(m,b,datapoints)?

Answer 2

i found this in Stack Overflow:

inf is infinity - a value that is greater than any other value. -inf is therefore smaller than any other value.

Answer 3

Slick that's not string bro inf is infinity in python and it is written as float("inf") not float(inf)

Answer 4

Lothar yeah exactly..this the definition from the very basic of mathematics. that inf is the largest while -inf is smallest number..that's why they are named so.

Answer 5

it also looks like you are comparing an integer and a string.

your line:

smallest_error = float('inf')

is equal to a string
https://code.sololearn.com/cg7Dv16z7n2I/?ref=app

Answer 6

Btw i got where i was committing mistake it...I should have given the arguments to calculate_all_error Function in the 4th line from last.

Answer 7

Jayakrishna has been showing me this. Im super wrong there. Its gotta be in one of the functions then

Answer 8

Jayakrishna🇮🇳 exactly thank you.