https://www.datacamp.com/courses/importing-data-in-r-part-1
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Importing Data in R (Part 1)
Filip Schouwenaars
https://www.datacamp.com/courses/importing-data-in-r-part-1

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You will then cover the readr and data.table packages to easily and efficiently import flat file data. After that you will learn how to read XLS files in R using readxl and gdata.

这四个包是读取 `csv` 和 `excel` 最常见的包。

Reproducible Excel work with XLConnect

https://s3.amazonaws.com/assets.datacamp.com/production/course_1477/slides/importing_data_in_r_1_ch1.pdf
https://s3.amazonaws.com/assets.datacamp.com/production/course_1477/slides/importing_data_in_r_1_ch2.pdf
https://s3.amazonaws.com/assets.datacamp.com/production/course_1477/slides/importing_data_in_r_1_ch3.pdf
https://s3.amazonaws.com/assets.datacamp.com/production/course_1477/slides/importing_data_in_r_1_ch4.pdf


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