[R-SIG-Finance] Slots as @title and @documentation in S-Plus

Brian G. Peterson brian at braverock.com
Fri Dec 19 12:18:25 CET 2008

Wind wrote:
> In S-Plus, data frames have slots as @title and @documentation.  It seems that R is different.
> After the following code:
> vMatrix<-sqlQuery(sqlMatrix,sqlStr1) 
> If I want to add some memo to vMatrix£¬it would be vMatrix at title="The first time and so on." in S-Plus.
> But in R, data frame has no slots.
> According to help and documentations, it seems that S4 class has slot. But data frame is not S4.   The S4/S3 confused me since I am new to R.
> I wonder whether thers's easy way to attach some memo to a data frame, as in S-Plus.
> Thanks.

First of all, this question belonged on r-help, not r-sig-finance, since it has 
nothing to do with finance, and you'd be likely to get better and faster 
answers from the much larger community there.

Next, see ?list, or better yet, use xts for your time series data, since it 
already has a convenient way to add whatever arbitrary attributes you want.


      - Brian

Brian G. Peterson
Ph: 773-459-4973
IM: bgpbraverock

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