Shilpa Singh ssingh1187

git clone [email protected]:YOUR-USERNAME/YOUR-FORKED-REPO.git

cd into/cloned/fork-repo
git remote add upstream git://github.com/ORIGINAL-DEV-USERNAME/REPO-YOU-FORKED-FROM.git
git fetch upstream

	import numpy as np
	import collections

	# These functions have been designed with numpy in mind. To
	# that end they take arrays as inputs and provide arrays as output

	def derivative(f):
	def df(x, h=0.1e-10):
	return np.array((f(x+h)-f(x-h))/(2*h))
	return df