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A python library for the computation of various concentration, inequality and diversity indices

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Looking for the formula here http://www.openriskmanual.org/wiki/Gini_Index ![image](https://user-images.githubusercontent.com/7966495/39734576-4510d23e-524e-11e8-89a5-7342a1f3cc2a.png) It seem that this code is wrong (but it works perfectly) ```python (1.0 - 2.0 * np.multiply(i, weights).sum())/n + 1.0 ``` I think...

Documentation

This looks like a fine library! I think it can help me a lot. Alas, I don't know how to get it. Your documentation doesn't state how to get it,...

Documentation

Margalef index implemented as first example, more to follow

enhancement

Provide "standard" choice by default, offer additional options via parameter

enhancement

Integrate Lorenz curve calculation / plotting along with Gini index

enhancement