# vectorizing optimization or root finding [closed]

I need to find the roots of a function. I am currently using scipy.optimize.fsolve

    def f(z):
return ((1-2*z)*np.exp(-d/z))/(((1-z)**(2+d))*(z**(2-d)))
# d is a constant ndarray of shape(300000,)
# hence f(z) is an ndarray of shape (300000,)

def trap(func,a,b,num): #trapezoidal approach to integration
xlinear=np.linspace(a,b,num)
dx=np.diff(xlinear)
fx=func(xlinear[:,None])
f12=fx[:-1,:]+fx[1:,:]
return np.dot(dx,f12)/2.0
#also returns an array of shape (300000,)

def integral(p):
return trap(f,0,p,1000)

root= fsolve(f,0.75) # 0.75 because the answer should lie in (0.5,1)


The issue is that I was expecting fsolve to return an array in line with returns of functions f and trap. However, somehow I am only getting a array of shape (1,)

## closed as off-topic by Kirill, nicoguaro♦, LKlevin, Wrzlprmft, GertVdENov 24 '16 at 19:47

This question appears to be off-topic. The users who voted to close gave this specific reason:

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• While the problem you're attempting to solve is based in computational science, the question is strictly on Python programming and thus off-topic here. – Spencer Bryngelson Nov 1 '16 at 4:15