SVD算法的Spark实现，基于Graphx
the 0th iteration rmse:1.851604709434495
the 1th iteration rmse:1.851604709434495
the 2th iteration rmse:1.851604709434495
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the 14th iteration rmse:1.5906466045045686
the 15th iteration rmse:1.5402407965091858
the 16th iteration rmse:1.4899101205933827
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the 26th iteration rmse:1.115008898115847
the 27th iteration rmse:1.0928688143820833
the 28th iteration rmse:1.0730171230992982
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the 37th iteration rmse:0.9679618864176048
the 38th iteration rmse:0.9617990495113765
the 39th iteration rmse:0.9563335641954871
the 40th iteration rmse:0.9514894652389861
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the 54th iteration rmse:0.9206856872685684
the 55th iteration rmse:0.9198914474497037
the 56th iteration rmse:0.9191873497272969
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the 66th iteration rmse:0.9153332050308551
the 67th iteration rmse:0.915145566977985
the 68th iteration rmse:0.9149791696334614
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the 80th iteration rmse:0.9139825535220126
the 81th iteration rmse:0.9139471224914135
the 82th iteration rmse:0.913915515720309
the 83th iteration rmse:0.9138872953760498