[R] How to use tapply with more than one variables grouped

PIKAL Petr petr.pikal at precheza.cz
Mon Oct 22 15:55:35 CEST 2012


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of noobmin
> Sent: Monday, October 22, 2012 12:31 PM
> To: r-help at r-project.org
> Subject: Re: [R] How to use tapply with more than one variables grouped
> interTable <-data.frame (Tapply ($ contb_receipt_amt date, list ($
> cand_nm date, $ contbr_st date), sum))
> I got create a table with the sum total contribution
> (contb_receipt_amt) of each presidential candidate (cand_nm) in each
> state (contbr_st). How could from interTable create a table of  states
> where candidate 'Obama' has received greater Contribution?

Greater than what? How does the table look like? Sorry I forgot my crystal ball at home.

Maybe you want to look to



> thanks
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