Tobias Muhlhofer wrote:
Hi!
I'm trying to do the following.
I have monthly a dataset with, among other things, "marketcap", and
"return".
I want to multiply return by the marketcap of the previous month. How
do I do this?
In STATA (which I have used frequently in the past) I would simply use
an expression of the form
return[_n]*marketcap[_n-1]
I believe they call this relative subscripting. Is there something
like this in R?
On a completely different note, are there books on R? I read the
"Getting Started" notes, but, while helpful, I would need more than
those.
Q 2.7 in the R faq (yes, there are many)!
Kjetil
Thanks,
Toby
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