R help - Apr 2010 - How use lapply over one column in a dataframe?

So I have Transactions as a dataframe and Transactions$Symbol is a column in the
frame

I simply want to run sub over all elements in that column where the new value
replaces the old value

this doesn't seem to work

Transactions$Symbol = lapply(Transactions$Symbol, function(x) sub('[
-]*','INST',x))
> 
> Transactions$Symbol
NULL

Try this:

Transactions$Symbol <- gsub('[
-]*','INST',Transactions$Symbol)


On Mon, Apr 26, 2010 at 10:14 AM, Robert Nicholson <
robert.nicholson@gmail.com> wrote:
> So I have Transactions as a dataframe and Transactions$Symbol is a column
> in the frame
>
> I simply want to run sub over all elements in that column where the new
> value replaces the old value
>
> this doesn't seem to work
>
> Transactions$Symbol = lapply(Transactions$Symbol, function(x) sub('[
> -]*','INST',x))
> >
> > Transactions$Symbol
> NULL
>
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>


-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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