[R] to modify a vector

[kjetil brinchmann halvorsen]

On 8 Feb 2003 at 15:41, Mitsuo Igarashi wrote:

You should realy read "An Introduction to R", which comes
with your R installation.

> Hi All.
> 
> I am quite a newbie to R.
> This is a basic question.
> 
> I like to modify elements of a vector.
> For Example:
> a1 <- c(1,2,3,4,3,5)
> 
> TThe following program sentence does not work but the intention is;
>   
>   if (a1==3) a1*3 .
> 
> 3 in the vector should be changed to 9, and
> the resulted vector is (1,2,9,4,9,5).
> 

a1[a1==3] <- 9

Kjetil Halvorsen

> How can I get the result?
> 
> Thanks in advance for help.
> -------========--------
> mitsu5
> mitsu5 at ruby.famille.ne.jp
> 
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