[18729] in s-news-athena
[S] Tree mystery (minor correction)
daemon@ATHENA.MIT.EDU (Buttrey, Samuel)
Fri Jul 23 12:52:10 1999
Message-Id: <DB17FBA383E4D211A9AF00A0C99E0169CAD96F@monterey.nps.navy.mil>
From: "Buttrey, Samuel" <sebuttre@monterey.nps.navy.mil>
To: "'s-news@wubios.wustl.edu'" <s-news@wubios.wustl.edu>
Cc: "Kobayashi, Izumi" <ikobaya@nps.navy.mil>,
"Koyak, Robert"
<rakoyak@monterey.nps.navy.mil>,
"Whitaker, Lyn"
<LWhitaker@monterey.nps.navy.mil>,
"Read, Robert"
<RRead@monterey.nps.navy.mil>
Date: Fri, 23 Jul 1999 09:53:30 -0700
Mime-Version: 1.0
Content-Type: text/plain
Sorry. When I said:
> Consider this six-row data frame.
>
> > test <- data.frame (y = as.factor (c(0, 0, 1, 1, 1, 1)), x = c(0, 1,
> 1.00001, 1.00001, 2, 2))
>
> The ideal tree would split x between 1 and 1.00001, perhaps at the
> mid-point, 1.000005.
>
the next line should have read
"then both observations where y = 0 would go to the left, and all four where
y = 1 would go to the right."
Sorry,
Sam Buttrey
buttrey@nps.navy.mil
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