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user 15606
For questions about programming languages, implementation, and packages in quantitative finance. Note: question must be specific to quantitative finance and must necessitate knowledge of quantitative finance in order to be on topic.
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Rollapply: what does by.column do? [closed]
I have read the description of by.column for rollapply in the manual but i couldn't understand how to use it. see below:
x=matrix(1:60,nrow=10)
rollapply(x,3,mean,fill=NA,align="right",by.column=FAL …
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