learning R with lapply and sapply（不懂）
在這節中，我們將學習lapply()和sapply()兩個作爲循環功能中最重要的兩個函數。它以及其他相關的vapply(),tapply()提供了一個方便的手段去執行數據分析中的「Split-Apply-Combine」 將資料組放在一個叫flags的變量中，更多的信息可以在http://archive.ics.uci.edu/ml/datasets/Flags中找到。我們可以用head
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相關文章
- 1. learning R with swirl-vapply and tapply（不懂）
- 2. learning R with swirl-workspace and files
- 3. R語言-向量化操做（apply、tapply、lapply、sapply、mapply、table等）
- 4. learning R with swirl-dates and times
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- 8. 8 Planning and Learning with Tabular Methods
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- 10. learning R with swirl-sequences of numbers