Great, thanks, Olivia. I had forgotten that command.
And I
hadn't
realized the Zelig manual got into basic [R] stuff so much.
I'll be
able to finish it just fine.
Andy
On Tue, 28 Sep 2004 17:54:49 -0400, Olivia Lau
<olau(a)fas.harvard.edu> wrote:
Andy,
Gary discussed this in class on Monday. Look at the code
dealing with the
Monte Hall problem, specifically the line that says:
doorsLeft <- doors[doors != choice]
Part of the assignment is figuring out how R works (which is
why the
assignment is pretty easy mathematically), so...you should
look at Zelig
chapters 2-3, or more specifically p. 24. If you want to
drop stuff, you
use the same commands, but on the LHS of the arrow. On the
RHS of the arrow
is the new variable name. (As it is above.)
Yours,
Olivia
----- Original Message -----
From: "Andrew Eggers" <aeggers(a)gmail.com>
To: "Olivia Lau" <olau(a)fas.harvard.edu>
Sent: Tuesday, September 28, 2004 5:45 PM
Subject: R question
O,
I am tired of sifting through R manuals for this -- can you
give me a
few command hints?
1. how can I drop members of an object, given a logical
condition (e.g.
Y<2)?
2. how can I make operators work on an object containing
missing
values, and not themselves produce missing values?
Thanks,
Andy
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