http://code.activestate.com/recipes/tags/median-mean/2011-04-19T15:00:57-07:00ActiveState Code Recipes2010-02-07T14:40:03-08:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/576930-efficient-running-median-using-an-indexable-skipli/

<p style="color: grey"> Python recipe 576930 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/advanced_data_structure/">advanced_data_structure</a>, <a href="/recipes/tags/container/">container</a>, <a href="/recipes/tags/median/">median</a>, <a href="/recipes/tags/new_algorithm/">new_algorithm</a>, <a href="/recipes/tags/skiplist/">skiplist</a>, <a href="/recipes/tags/sliding_window/">sliding_window</a>). Revision 10. </p> <p>Maintains sorted data as new elements are added and old one removed as a sliding window advances over a stream of data. Also gives fast indexed access to value. Running time per median update is proportional to the log of the window size.</p>

2011-04-19T15:00:57-07:00jimmy2timeshttp://code.activestate.com/recipes/users/4177690/http://code.activestate.com/recipes/577661-retrieving-the-median-of-a-set-in-constant-time/

<p style="color: grey"> Python recipe 577661 by <a href="/recipes/users/4177690/">jimmy2times</a> (<a href="/recipes/tags/data/">data</a>, <a href="/recipes/tags/heap/">heap</a>, <a href="/recipes/tags/median/">median</a>, <a href="/recipes/tags/python/">python</a>, <a href="/recipes/tags/retrieving/">retrieving</a>, <a href="/recipes/tags/structure/">structure</a>). Revision 2. </p> <p>Provides a data structure for a queue of integers whose get() method returns the median element. The interface is similar to the standard Queue module, with an added method top() to retrieve the median without removing it.</p>

2010-03-03T11:06:29-08:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/577073-fast-running-median-using-an-indexable-skiplist-fa/

<p style="color: grey"> Python recipe 577073 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/algorithm/">algorithm</a>, <a href="/recipes/tags/indexable/">indexable</a>, <a href="/recipes/tags/median/">median</a>, <a href="/recipes/tags/running/">running</a>, <a href="/recipes/tags/skiplist/">skiplist</a>, <a href="/recipes/tags/statistics/">statistics</a>). Revision 5. </p> <p>Fast version of r576930 reimplemented using a list of lists instead of a node class. </p>

2010-02-20T08:22:00-08:00Raymond Hettingerhttp://code.activestate.com/recipes/users/178123/http://code.activestate.com/recipes/577059-running-median/

<p style="color: grey"> Python recipe 577059 by <a href="/recipes/users/178123/">Raymond Hettinger</a> (<a href="/recipes/tags/median/">median</a>). </p> <p>Maintains sorted data as new elements are added and old one removed as a sliding window advances over a stream of data. Running time per median calculation is proportional to the square-root of the window size.</p>