[R] Changing factor to numeric

Gabor Grothendieck ggrothendieck at gmail.com
Tue Mar 10 14:25:05 CET 2009

If you don't need any factors use read.csv(...whatever..., as.is = TRUE)
and then as.numeric will work.

On Tue, Mar 10, 2009 at 1:25 AM, ojal john owino
<ojal.johnowino at googlemail.com> wrote:
> Dear Users,
> I have a variable in my dataset which is of type factor. But it actually
> contains numeric entries which like 5.735  4.759 ..... This is because the
> data was read from a CSV file into R and this variable contained other
> charaters which were not numeric. I have now dropped the records with the
> characters which are not numeric for this variable and want to change it to
> numeric srotage type.
> I have tried using as.numeric() function but it changes the values in the
> variable to what I think are the ranks of the individual values of the
> varible in the dataset. For example if 5.735 is the current content in the
> field, then the new object created by as.numeric will contain a value like
> 680 if the 5.735 was the highest value for the varible and the dataset had
> 680 records.
> How can I change the storage type without changing the contents of this
> variable in this case?
> Thanks for your consideration.
> --
> Ojal John Owino
> P.O Box 230-80108
> Kilifi, Kenya.
> Mobile:+254 728 095 710
>        [[alternative HTML version deleted]]
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