Memming's Inconsistency: sumsumK-vs-o-K-o에 달린 최근 댓글/트랙백 목록 http://blog.memming.com/ Nothing Personal, Yet Subjective en Fri, 22 Jan 2010 20:49:39 -0500 Textcube 1.7.8 : Con moto Memming's Inconsistency: sumsumK-vs-o-K-o에 달린 최근 댓글/트랙백 목록 http://isloco.com/attach/207/1206854295.png http://blog.memming.com/ 283 283 Nothing Personal, Yet Subjective Comment by Memming http://blog.memming.com/entry/sumsumK-vs-o-K-o#comment73546 I should have compared against sum(K(:)) as well.....Hmmmm (Memming) http://blog.memming.com/entry/sumsumK-vs-o-K-o#comment73546 http://blog.memming.com/entry/sumsumK-vs-o-K-o#comment Thu, 21 Jan 2010 15:32:26 -0500 Comment by Memming http://blog.memming.com/entry/sumsumK-vs-o-K-o#comment73547 >> o = ones(1,size(K,1)); tic; for k = 1:10000; o * K * o'; end; toc Elapsed time is 0.151128 seconds. >> tic; for k = 1:10000; sum(sum(K)); end; toc Elapsed time is 0.257047 seconds. >> tic; for k = 1:10000; sum(K(:)); end; toc Elapsed time is 0.224368 seconds. (Memming) http://blog.memming.com/entry/sumsumK-vs-o-K-o#comment73547 http://blog.memming.com/entry/sumsumK-vs-o-K-o#comment Fri, 22 Jan 2010 17:23:52 -0500