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Wayne's Talk 韋恩愛講話
  • Android
    • Android
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    • Swift
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Photo by Food Photographer | Jennifer Pallian on Unsplash
  • Artificial Intelligence
  • Machine Learning

邏輯斯回歸(Logistic Regression)

  • ByWayne
  • 23/12/2024
  • 1.1K views
Logistic regression 是一個資料分析技術,被用來做分類(classification)。它大概是分類演算法中最簡單的模型。因此,很適合當初學者的第一個分類演算法。
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Browsing Category

Machine Learning

9 posts
Photo by Food Photographer | Jennifer Pallian on Unsplash
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  • 1.1K views
  • 7 minute read
  • Artificial Intelligence
  • Machine Learning

邏輯斯回歸(Logistic Regression)

  • ByWayne
  • 23/12/2024
Logistic regression 是一個資料分析技術,被用來做分類(classification)。它大概是分類演算法中最簡單的模型。因此,很適合當初學者的第一個分類演算法。
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Photo by Louis Hansel @shotsoflouis on Unsplash
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  • 1.1K views
  • 7 minute read
  • Artificial Intelligence
  • Machine Learning

線性回歸(Linear Regression)

  • ByWayne
  • 08/12/2024
Linear regression 是一個資料分析技術,且使用線性函數來預測未知的資料。雖然 linear regression 模型相對簡單,但它是一個成熟的統計技術。
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Photo by Ashley Knedler on Unsplash
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  • 672 views
  • 2 minute read
  • Artificial Intelligence
  • Machine Learning

正則化(Regularization)

  • ByWayne
  • 02/07/2024
當模型的效能低下時,它無法準確地預測資料。它的主因可能是 overfitting 或 underfitting。如果是 overfitting 的情況,我們可以使用 regularization 來解決模型 overfitting 的問題。
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Photo by Jeremy Bishop on Unsplash
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  • 606 views
  • 1 minute read
  • Artificial Intelligence
  • Machine Learning

過擬合和欠擬合(Overfitting and Underfitting)

  • ByWayne
  • 02/07/2024
過擬合和欠擬合(Overfitting and underfitting)是模型準確率不彰的主因。要能夠判斷模型是 overfitting 還是 underfitting,才能夠採取正確的方法來提升模型的效能。
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Photo by ŞULE MAKAROĞLU on Unsplash
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  • 694 views
  • 1 minute read
  • Artificial Intelligence
  • Machine Learning

特徵縮放(Feature Scaling)

  • ByWayne
  • 24/06/2024
在機器學習中,在我們將資料拿來訓練模型之前,通常要先對資料做特徵縮放(feature scaling)。本文章將介紹一些 feature scaling 的方法。
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Photo by Marek Piwnicki on Unsplash
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  • 1.0K views
  • 1 minute read
  • Artificial Intelligence
  • Machine Learning

混淆矩陣(Confusion Matrix)

  • ByWayne
  • 24/05/2024
混淆矩陣是一個用來衡量模型效能的工具。這使得資料科學家可以分析並優化模型。因此,在學習機器學習時,我們必須要學會使用混淆矩陣。此外,本文章還會介紹 accuracy、recall、precision、和 F1 score。
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Photo by Melnychuk Nataliya on Unsplash
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  • 4.3K views
  • 1 minute read
  • Artificial Intelligence
  • Machine Learning

SciPy 斯皮爾曼相關係數(Spearman Correlation Coefficient)

  • ByWayne
  • 06/01/2021
斯皮爾曼相關係數(Spearman Correlation Coefficient)是一種無母數(nonparametric)方法。它將兩個變數分別依大小排序後的等級(rank),再以各等級差進行計算,以衡量兩變數的相關性。
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Photo by Jaeyoung Geoffrey Kang on Unsplash
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  • 4.3K views
  • 1 minute read
  • Artificial Intelligence
  • Machine Learning

SciPy 曼-惠特尼U檢定(Mann-Whitney U Test)

  • ByWayne
  • 30/12/2020
曼-惠特尼U檢定(Mann-Whitney U Test)是一種無母數檢定(nonparametric test)。它將兩個樣本的資料先合併,再依照大小排序的等級(rank)來測定兩個母群體在分佈上是否相同。
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Photo by Tim Gouw on Unsplash
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  • 7.9K views
  • 2 minute read
  • Artificial Intelligence
  • Machine Learning

SciPy 卡方檢定(Chi-Square Test)

  • ByWayne
  • 30/12/2020
卡方檢定(Chi-Square Test)根據觀察次數(observed frequencies)測定在交叉表裡的變數是否有無關聯。SciPy 的 chi2_contingency() 可以幫我們快速計算 chi-square statistic 和 p-value。
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