Message-ID: <4587A27C.60407@good.ibl.fr>
Date: 2006-12-19T08:27:40Z
From: Jacques VESLOT
Subject: how to replace some objects?
In-Reply-To: <3f2938d50612190005h2b0f56c0h952e19f53081b944@mail.gmail.com>
you can use as.numeric(factor( )); in your example:
> ex <- sample(letters[1:3], 10, T)
> ex
[1] "b" "b" "c" "b" "a" "a" "b" "b" "a" "a"
> as.numeric(factor(ex))
[1] 2 2 3 2 1 1 2 2 1 1
if the order is different, use levels:
> as.numeric(factor(ex, levels=letters[3:1]))
[1] 2 2 1 2 3 3 2 2 3 3
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Jacques VESLOT
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Zhang Jian a ?crit :
> I want to replace some objects in one row or column.For example,
> One colume: a,b,a,c,b,b,a,a,c.
> I want to replace "a" with "1", "b" with "2", and "c" with "3".
> Like this: 1,2,1,3,2,2,1,1,3.
>
> How to do it? I donot know how to do it. Thanks.
>
> [[alternative HTML version deleted]]
>
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