202120.rar
(843.85 KB)
本附件包括:
Phil Spector, Data Manipulation with R (2008)
1 Data in R
2 Reading and Writing Data
3 R and Databases
4 Dates
5 Factors
6 Subscripting
7 Character Manipulation
8 Data Aggregation
9 Reshaping Data
[此贴子已经被作者于2008-3-30 20:45:38编辑过]


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