R help - Oct 2000 - Adding a new column to data frame (recoding)

Dear R users,

I have a very simple question. What is the easiest way to recode data in
one
of the columns of a data frame and put it into a new column?

For example, here is a simple data frame:

  var1
1    1
2    2
3    3

How do I add a new column to data - 'var2' in which I group  values in
'var1',
for example:

  var1 var2
1    1    4
2    2    4
3    3    5

It's got to be simple, but I can't find it...

Aleksey

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Aleksey Naumov <naumov at acsu.buffalo.edu> writes:
> How do I add a new column to data - 'var2' in which I group  values
in
> 'var1',
> for example:
> 
>   var1 var2
> 1    1    4
> 2    2    4
> 3    3    5
> 
> It's got to be simple, but I can't find it...
data$var2 <- c(4,4,5)[data$var1]

or 

data <- transform(data, var2=c(4,4,5)[var1])

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