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Cool!!!

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看看是不是免费。

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An Introduction to Data Analysis using Aggregation Functions in R

好，看看

好书，感谢分享

有兴趣看看

有一本关于R的入门新书，不知道会不会有雷同感，谢谢分享！

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An Introduction to Data Analysis using Aggregation Functions in R

Authors: Simon James

n this book, you will learn:
• How to interact with key Excel objects, such as the application object, workbook object, and range object
• Methods for working with ranges in detail using code
• Usage of Excel as a database repository
• How to exchange data between Excel applications
• How to use the Windows API to expand the capabilities of Excel
• A step-by-step method for producing your own custom Excel ribbon

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