下面的demo是根据kmeans算法原理实现的demo，使用到的数据是kmeans.txt
1 1.658985 4.285136 2 -3.453687 3.424321 3 4.838138 -1.151539 4 -5.379713 -3.362104 5 0.972564 2.924086 6 -3.567919 1.531611 7 0.450614 -3.302219 8 -3.487105 -1.724432 9 2.668759 1.594842 10 -3.156485 3.191137 11 3.165506 -3.999838 12 -2.786837 -3.099354 13 4.208187 2.984927 14 -2.123337 2.943366 15 0.704199 -0.479481 16 -0.392370 -3.963704 17 2.831667 1.574018 18 -0.790153 3.343144 19 2.943496 -3.357075 20 -3.195883 -2.283926 21 2.336445 2.875106 22 -1.786345 2.554248 23 2.190101 -1.906020 24 -3.403367 -2.778288 25 1.778124 3.880832 26 -1.688346 2.230267 27 2.592976 -2.054368 28 -4.007257 -3.207066 29 2.257734 3.387564 30 -2.679011 0.785119 31 0.939512 -4.023563 32 -3.674424 -2.261084 33 2.046259 2.735279 34 -3.189470 1.780269 35 4.372646 -0.822248 36 -2.579316 -3.497576 37 1.889034 5.190400 38 -0.798747 2.185588 39 2.836520 -2.658556 40 -3.837877 -3.253815 41 2.096701 3.886007 42 -2.709034 2.923887 43 3.367037 -3.184789 44 -2.121479 -4.232586 45 2.329546 3.179764 46 -3.284816 3.273099 47 3.091414 -3.815232 48 -3.762093 -2.432191 49 3.542056 2.778832 50 -1.736822 4.241041 51 2.127073 -2.983680 52 -4.323818 -3.938116 53 3.792121 5.135768 54 -4.786473 3.358547 55 2.624081 -3.260715 56 -4.009299 -2.978115 57 2.493525 1.963710 58 -2.513661 2.642162 59 1.864375 -3.176309 60 -3.171184 -3.572452 61 2.894220 2.489128 62 -2.562539 2.884438 63 3.491078 -3.947487 64 -2.565729 -2.012114 65 3.332948 3.983102 66 -1.616805 3.573188 67 2.280615 -2.559444 68 -2.651229 -3.103198 69 2.321395 3.154987 70 -1.685703 2.939697 71 3.031012 -3.620252 72 -4.599622 -2.185829 73 4.196223 1.126677 74 -2.133863 3.093686 75 4.668892 -2.562705 76 -2.793241 -2.149706 77 2.884105 3.043438 78 -2.967647 2.848696 79 4.479332 -1.764772 80 -4.905566 -2.911070