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NEW QUESTION: 1
次のように定義された6つのデータポイントを含むPython NumPy配列を評価しています。
データ= [10、20、30、40、50、60]
Python Scikit-learn機械学習ライブラリのk-foldアルゴリズムの埋め込みを使用して、次の出力を生成する必要があります。
train: [10 40 50 60], test: [20 30]
train: [20 30 40 60], test: [10 50]
train: [10 20 30 50], test: [40 60]
出力を生成するには、相互検証を実装する必要があります。
どのようにコードセグメントを完成させるべきですか?回答するには、回答領域のダイアログボックスで適切なコードセグメントを選択します。
注:それぞれの正しい選択には1ポイントの価値があります。
Answer:
Explanation:
Explanation:
Box 1: k-fold
Box 2: 3
K-Folds cross-validator provides train/test indices to split data in train/test sets. Split dataset into k consecutive folds (without shuffling by default).
The parameter n_splits ( int, default=3) is the number of folds. Must be at least 2.
Box 3: data
Example: Example:
>>>
>>> from sklearn.model_selection import KFold
>>> X = np.array([[1, 2], [3, 4], [1, 2], [3, 4]])
>>> y = np.array([1, 2, 3, 4])
>>> kf = KFold(n_splits=2)
>>> kf.get_n_splits(X)
2
>>> print(kf)
KFold(n_splits=2, random_state=None, shuffle=False)
>>> for train_index, test_index in kf.split(X):
... print("TRAIN:", train_index, "TEST:", test_index)
... X_train, X_test = X[train_index], X[test_index]
... y_train, y_test = y[train_index], y[test_index]
TRAIN: [2 3] TEST: [0 1]
TRAIN: [0 1] TEST: [2 3]
References:
https://scikit-learn.org/stable/modules/generated/sklearn.model_selection.KFold.html
NEW QUESTION: 2
You are developing a SQL Server PowerPivot workbook that sources data from a SQL Azure database. The PowerPivot model includes a single table named FactSales that consists of four columns named Year, Country, Product, and Revenue. The model includes the following two measures.
In Microsoft Excel 2010 you create the following PivotTable report.
Users report that the Sales % measure computes an incorrect ratio. The measure should meet a requirement to compute a ratio over all visible sales values defined by the query filters. The Grand Total value for the Sales % measure should equal 100%.
You need to fix the Sales % measure to meet the requirement.
Which Data Analysis Expressions (DAX) expression should you use?
A. =[sales] / CALCULATE([Sales], VALUES(FactSales[Year]), VALUES(FactSales[Country]))
B. =[sales] / [Sales](ALLSELECTED(FactSales))
C. =[sales] / [Sales](ALLEXCEPT(FactSales, FactSales[Year]))
D. =[Sales] / CALCULATE([Sales])
Answer: B
NEW QUESTION: 3
You create a Web Form. The Web Form displays sales information as a chart.
The chart must be rendered to the user's browser as a .jpeg file.
The chart is retrieved by using the following code segment.
Dim bmpChart As Bitmap = Chart.GetCurrentSales()
You need to display the chart to the user.
Which code segment should you use?
A. Response.ContentType = "text/html" bmpChart.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.MemoryBmp) bmpChart.Dispose()
B. Response.ContentType = "image/bitmap" bmpChart.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Bmp) bmpChart.Dispose()
C. Response.ContentType = "image/jpeg" bmpChart.Save(Response.OutputStream, System.Drawing.Imaging.ImageFormat.Jpeg) bmpChart.Dispose()
D. Response.ContentType = "text/jpeg" bmpChart.Save(Request.InputStream, System.Drawing.Imaging.ImageFormat.Jpeg) bmpChart.Dispose()
Answer: C
NEW QUESTION: 4
A. Option C
B. Option A
C. Option B
D. Option D
Answer: B,C
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