test file Rmse = NaN

[rubby33]

我用在MovieLens数据集上用SVD进行评分预测，参数使用的是（我的本机路径为/Users/jonny/Downloads）：
-train /Users/jonny/Downloads/ml-100k/ua.base -test /Users/jonny/Downloads/ml-100k/ua.test -out /Users/jonny/Downloads/ml-100k/out.txt

结果：n = 97 Rmse = 0.8602635047440215
n = 98 Rmse = 0.860263102178263
n = 99 Rmse = 0.860262739013079
n = 100 Rmse = 0.8602624110050218
------training complete!------
------predicting------
test file Rmse = NaN

预测的时候Rmse 为NaN

[cuncheng]

代码有误 在预测的时候 计算RMSE时 if (mOutputFileName.equals("")) 条件取反了 导致没有进行计算