Message-ID: <1350996719526-4647122.post@n4.nabble.com>
Date: 2012-10-23T12:51:59Z
From: noobmin
Subject: How to use tapply with more than one variables grouped
In-Reply-To: <1350992511282-4647111.post@n4.nabble.com>
I used these commands previously:
data <- read.csv("test.csv")
> tbl=
> data.frame(tapply(data$contb_receipt_amt,list(data$cand_nm,data$contbr_st),sum))
> tbl
AL AR CA NY
Doug 250 250 250 NA
Jennifer 20 340 300 100
Michele 250 500 250 60
Obama 15 45 520 600
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