The zoo package has a yearqtr class that can represent quarterly
data. It is also possible to create zoo series of quarterly data. Such
series can be converted to ts class and that class can some
builtin support for quarterly data as well.
> library(zoo)
> as.yearqtr("200706", "%Y%m")
[1] "2007 Q
I have financial data on a a set of firms, with a quarterly period
(fundamental data). The data spans 10 years, and four quarters per
year. The present file (.csv) reads the Date columns as "200706" for
the second quarter of 2007; "199809" for the third quarter of 1997.
Is there a way I can conver
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