我运行了一个网格搜索，其中epochs是超参数之一。选择最佳模型后，如何确定为此特定模型选择的纪元？
以下是该模型的摘要 型号细节： ==============
H2OBinomialModel: deeplearning
Model ID: dl_grid_model_19
Status of Neuron Layers: predicting Churn, 2-class classification, bernoulli distribution, CrossEntropy loss, 4,226 weights/biases, 44.1 KB, 47,520 training samples, mini-batch size 1
layer units type dropout l1 l2 mean_rate rate_rms momentum mean_weight weight_rms
1 1 30 Input 0.00 %
2 2 32 RectifierDropout 20.00 % 0.000010 0.000010 0.009995 0.000000 0.501901 -0.011006 0.210611
3 3 32 RectifierDropout 20.00 % 0.000010 0.000010 0.009995 0.000000 0.501901 -0.035854 0.191687
4 4 32 RectifierDropout 20.00 % 0.000010 0.000010 0.009995 0.000000 0.501901 -0.029072 0.185352
5 5 32 RectifierDropout 20.00 % 0.000010 0.000010 0.009995 0.000000 0.501901 -0.057359 0.186863
6 6 2 Softmax 0.000010 0.000010 0.009995 0.000000 0.501901 0.122655 0.406789
mean_bias bias_rms
1
2 0.401924 0.136989
3 0.938406 0.041128
4 0.950918 0.043826
5 0.915588 0.060796
6 0.019925 0.175195
H2OBinomialMetrics: deeplearning
** Reported on training data. **
** Metrics reported on full training frame **
MSE: 0.1946901
RMSE: 0.441237
LogLoss: 0.5731371
Mean Per-Class Error: 0.194215
AUC: 0.8767996
Gini: 0.7535992
Confusion Matrix for F1-optimal threshold:
No Yes Error Rate
No 1755 614 0.259181 =614/2369
Yes 308 2075 0.129249 =308/2383
Totals 2063 2689 0.194024 =922/4752
Maximum Metrics: Maximum metrics at their respective thresholds
metric threshold value idx
1 max f1 0.216316 0.818218 266
2 max f2 0.058723 0.889206 348
3 max f0point5 0.306487 0.801744 216
4 max accuracy 0.217122 0.805976 265
5 max precision 0.730797 1.000000 0
6 max recall 0.006754 1.000000 398
7 max specificity 0.730797 1.000000 0
8 max absolute_mcc 0.216316 0.616944 266
9 max min_per_class_accuracy 0.257957 0.795636 242
10 max mean_per_class_accuracy 0.217122 0.805792 265
Gains/Lift Table: Extract with `h2o.gainsLift(<model>, <data>)` or `h2o.gainsLift(<model>, valid=<T/F>, xval=<T/F>)`
H2OBinomialMetrics: deeplearning
** Reported on validation data. **
** Metrics reported on full validation frame **
MSE: 0.1418929
RMSE: 0.3766867
LogLoss: 0.4374728
Mean Per-Class Error: 0.2603761
AUC: 0.8306744
Gini: 0.6613489
Confusion Matrix for F1-optimal threshold:
No Yes Error Rate
No 1075 201 0.157524 =201/1276
Yes 162 284 0.363229 =162/446
Totals 1237 485 0.210801 =363/1722
Maximum Metrics: Maximum metrics at their respective thresholds
metric threshold value idx
1 max f1 0.323830 0.610097 183
2 max f2 0.087110 0.740000 319
3 max f0point5 0.514027 0.608666 94
4 max accuracy 0.514027 0.800232 94
5 max precision 0.668538 0.875000 21
6 max recall 0.011443 1.000000 389
7 max specificity 0.717464 0.999216 0
8 max absolute_mcc 0.323830 0.466764 183
9 max min_per_class_accuracy 0.229876 0.746082 238
10 max mean_per_class_accuracy 0.173814 0.753367 273
Gains/Lift Table: Extract with `h2o.gainsLift(<model>, <data>)` or `h2o.gainsLift(<model>, valid=<T/F>, xval=<T/F>)`
答案 0 :(得分：2)
要了解模型使用了多少个纪元，最好的方法是查看分数历史记录。例如。对于模型 <?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context="com.example.alime.beispieltextview1.MainActivity">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="150dp">
<TextView
android:id="@+id/text1"
android:layout_width="80dp"
android:layout_height="30dp"
android:layout_alignParentStart="true"
android:layout_below="@+id/frage1"
android:layout_marginTop="14dp"
android:text="Zutat: *"
android:textColor="@android:color/background_dark"
android:textSize="18sp"
android:textStyle="normal|bold" />
<AutoCompleteTextView
android:id="@+id/zutatensuche"
android:layout_width="260dp"
android:layout_height="40dp"
android:layout_alignParentStart="true"
android:layout_below="@+id/text1"
android:background="@android:drawable/editbox_dropdown_light_frame"
android:ems="10"
android:inputType="textPersonName"
android:singleLine="true"/>
<Button
android:id="@+id/button"
android:layout_width="60dp"
android:layout_height="45dp"
android:layout_alignBaseline="@+id/zutatensuche"
android:layout_alignBottom="@+id/zutatensuche"
android:layout_alignEnd="@+id/suchbutton"
android:text="+"
android:background="#FF2FC10F"/>
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="108dp"
android:id="@+id/layoutlist">
<TextView
android:id="@+id/zutat1"
android:layout_width="150dp"
android:layout_margin="10dp"
android:layout_height="30dp" />
<TextView
android:layout_height="30dp"
android:id="@+id/zutat2"
android:layout_width="150dp"
android:layout_margin="10dp" />
<TextView
android:layout_height="30dp"
android:id="@+id/zutat3"
android:layout_width="150dp"
android:layout_margin="10dp" />
<TextView
android:layout_height="30dp"
android:id="@+id/zutat4"
android:layout_width="150dp"
android:layout_margin="10dp" />
<TextView
android:layout_height="30dp"
android:id="@+id/zutat5"
android:layout_width="150dp"
android:layout_margin="10dp" />
<TextView
android:layout_height="30dp"
android:id="@+id/zutat6"
android:layout_width="150dp"
android:layout_margin="10dp" />
</LinearLayout>
<Button
android:text="Button"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="@+id/button8" />
</LinearLayout>
</RelativeLayout>
public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
/*Die eingegebenen Zutaten werden nach betätigen der Button aufgelistet*/
Button zutatbutton = (Button) findViewById(R.id.button);
zutatbutton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
EditText e = (EditText) findViewById(R.id.zutatensuche);
String text = e.getText().toString();
TextView t1 = (TextView) findViewById(R.id.zutat1);
TextView t2 = (TextView) findViewById(R.id.zutat2);
TextView t3 = (TextView) findViewById(R.id.zutat3);
TextView t4 = (TextView) findViewById(R.id.zutat4);
TextView t5 = (TextView) findViewById(R.id.zutat5);
TextView t6 = (TextView) findViewById(R.id.zutat6);
if (t1.getText().toString().trim().isEmpty()) {
t1.setText(text);
} else if (t2.getText().toString().trim().isEmpty()) {
String text2 = e.getText().toString();
t2.setText(text2);
} else if (t3.getText().toString().trim().isEmpty()) {
String text3 = e.getText().toString();
t3.setText(text3);
} else if (t4.getText().toString().trim().isEmpty()) {
String text4 = e.getText().toString();
t4.setText(text4);
} else if (t5.getText().toString().trim().isEmpty()) {
String text5 = e.getText().toString();
t5.setText(text5);
} else if (t6.getText().toString().trim().isEmpty()) {
String text6 = e.getText().toString();
t6.setText(text6);
}
e.setText("");
}
});
}
}
：
m（或者对于图形版本，绘制模型：h2o.scoreHistory(m)
）
这可能是太多的信息，所以减少它只显示时代：
plot(m)（我刚才注意到h2o.scoreHistory(m)[,c("epochs")]
也会奏效。）
显示返回的最终模型的纪元，包括：
h2o.scoreHistory(m)$epochs顺便说一句，如果您刚刚打印了网格对象，那么您应该将时期视为其中一个列，如果它是您的超参数之一。
回答你没有问过的问题：看看提前停止，这将使你不必提前猜测你需要多少个纪元，因此也可以节省你的网格搜索中有一个超参数。
您还可以简单地制作具有您正在考虑的最高纪元值的模型，并查看得分历史记录，以获得您感兴趣的每个其他纪元值的得分。