从您的第二个问题开始,Flow 具有精确/召回曲线(并且是交互式的)。 Flow 始终在每个节点的端口 54321 上运行,即 http://127.0.0.1:54321 如果您在本地运行 h2o。
我想你的数据或模型有一些有趣的地方,当你查看精度/召回曲线时,它就会变得清晰。
在 R 中,如果您执行 str(m)(其中 m 是您的模型),您将看到所有模型数据。 m@training_metrics@metrics$thresholds_and_metric_scores$recall 保存每个阈值的召回数。
我还不知道如何查看 Python 对象的内部,但您的调用是正确的。在我的快速测试中(添加了 2 类枚举列的 iris 数据集):
m.metric("recall")
给了:
[[0.8160852636726422, 1.0]]
如果我想要所有的值,它会是这样的:
mDL.metric("recall",thresholds=[x/100.0 for x in range(1,100)])
给予:
Could not find exact threshold 0.01; using closest threshold found 0.010396965719556233.
Could not find exact threshold 0.02; using closest threshold found 0.016617060110009896.
...
Could not find exact threshold 0.92; using closest threshold found 0.9469528904679438.
Could not find exact threshold 0.93; using closest threshold found 0.9469528904679438.
Could not find exact threshold 0.94; using closest threshold found 0.9469528904679438.
Could not find exact threshold 0.95; using closest threshold found 0.9469528904679438.
Could not find exact threshold 0.96; using closest threshold found 0.9469528904679438.
Could not find exact threshold 0.97; using closest threshold found 0.9760293572153097.
Could not find exact threshold 0.98; using closest threshold found 0.9787491606489236.
Could not find exact threshold 0.99; using closest threshold found 0.9909817370067531.
[[0.01, 1.0],
[0.02, 1.0],
[0.03, 1.0],
...
[0.87, 1.0],
[0.88, 1.0],
[0.89, 0.9850746268656716],
[0.9, 0.9850746268656716],
[0.91, 0.9850746268656716],
[0.92, 0.9850746268656716],
[0.93, 0.9850746268656716],
[0.94, 0.9850746268656716],
[0.95, 0.9850746268656716],
[0.96, 0.9850746268656716],
[0.97, 0.9701492537313433],
[0.98, 0.9552238805970149],
[0.99, 0.8955223880597015]]
(我得到了如此不寻常的输出,因为它几乎完美地学习了我的数据集 - 我怀疑这就是你所发生的事情?)(我愚蠢地让我的二进制列成为输入列之一的直接函数,没有噪音! )