Hello,


I'm very interested in using financial time series data, but I'm a beginner of R programming.
I'd like to fully understand internal logics on several time-series related packages such as quantmod, xts, zoo, chron, etc.
So, I read some books, 'R Cookbook' and 'Art of R Programming' and another simple tutorials.
But I still can't understand grammars of the packages codes.


Could you recommend some other books or educational materials about S/R language ? 


Thanks in advance,





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