Is this correct? def computeRoot(poly, x_0, epsilon): i=0 if len(poly)==1: root=0 elif len(poly)1: root=x_0 while evaluatePoly(poly,root)

Question

Is this correct?

def computeRoot(poly, x_0, epsilon):
    i=0
    if len(poly)==1:
        root=0

    elif len(poly)>1:
        root=x_0
        while evaluatePoly(poly,root)<abs(epsilon):
            deriv_poly=computeDeriv(poly)
            root=root-(evaluatePoly(poly,root)/evaluatePoly(deriv_poly,root))
            i+=1

    a=[root,i]

    return a

microbot · Answer

what error does the grader give you?
or it wont work even on your machine?

anonymous · Answer

It doesn't give any error, but it's not give me perfect answer....

microbot · Answer

ive sent u some notes about it!:)

anonymous · Answer

I suppose evaluatePoly is another function?

anonymous · Answer

yes. it's another function which compute a polynomial function with a value is given by argument as 'root'.

microbot · Answer

the 1st thing i see:
you control if len(poly)==1or>1
no need as computeDeriv does that for you!

then:
while evaluatePoly(poly,root)<abs(epsilon):
epsilon is always the same....i mean it wont change inside your code.you have to use abs with your root that could be negative.

and one other thing...does ur poly change everytime you get its derivative ?..i mean ,on every iteration u have to have the derivative of the derivative....etc