Message-ID: <f8e6ff050803121126h28d4475an7a25c6153aa0b7ba@mail.gmail.com>
Date: 2008-03-12T18:26:48Z
From: Hadley Wickham
Subject: Converting a data frame with values into a matrix/
In-Reply-To: <365152.31546.qm@web32801.mail.mud.yahoo.com>
> mm1 <- cast(mm, Class~Name)
> aba <- mm1[,2:6]
> aba[is.na(aba)] <- 1
> final <- data.frame(mm1$Class, aba)
> names(final) <- names(mm1)
> final
You can abbreviate all this to:
final <- cast(mm, Class ~ Name, fill = 1)
Hadley
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