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Why is X not defined?

import numpy as np

​

a = float(input("oppgi nedre grense, a, på intervallet:"))

b = float(input("oppgi øvre grense, b, på intervallet"))

n = int(input("oppgi ønsket antall partisjoner (delintervaller) (Husk partall):"))

ant_des = int(input("oppgi ønsket antall desimalet i svaret:"))

​

h = (b-a)/n

​

\#simpsons metode

x_vektor = np.linspace (a,b,n+1)

y_vektor = 1/ 1 + x**6



​

vekt = np.ones(len(x_vektor))

for i in range (1,n):

if i % 2 == 0:

vekt [i\] = 2

else:

vekt [i\] = 4

​

print ("Komponenten vektes etter flg system", vekt)

​

skalarprodukt = y_vektor * vekt

Sum= skalarprodukt * h/3

print (round(sum,ant_des))

​

I dont understand why this code dosent work. its a code thats suppose to give you the numbers to simpsons methode in math

/r/JupyterNotebooks
https://redd.it/y77txv