https://sourceforge.net/p/pnumpy/wiki/PnumpyReduce/Recent changes to PnumpyReduceenWed, 05 Feb 2014 13:02:23 -0000https://sourceforge.net/p/pnumpy/wiki/PnumpyReduce/<div class="markdown_content"><h2 id="applying-reduce">Applying reduce</h2> <p>To apply a reduction operation across all the elements of the distributed array, simply call, for instance, </p> <div class="codehilite"><pre><span class="n">checkSum</span> <span class="o">=</span> <span class="n">da</span><span class="p">.</span><span class="n">reduce</span><span class="p">(</span><span class="n">lambda</span> <span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="o">:</span><span class="n">x</span><span class="o">+</span><span class="n">y</span><span class="p">,</span> <span class="n">rootPe</span><span class="o">=</span><span class="mi">0</span><span class="p">)</span> </pre></div> <p>with the first argument being a function and the second (optional) argument being the rank of the process where the value is gathered. Here, checkSum will be None on all processes except <code>rootPe</code>.<br /> </p></div>Alexander PletzerWed, 05 Feb 2014 13:02:23 -0000https://sourceforge.net26d9c585943cc3ab6571a678c0c745e6cf5b718c