[R] trunc function

[Petr Savicky]

On Wed, Mar 09, 2011 at 05:36:35PM +0800, Luis Felipe Parra wrote:
> Hello. I would like to know if there exists in R a function like trunc but
> where i can choose how many decimal places can I stay with in the number I
> have (sort of the same as the trunc function in excel). I would like, for
> example if I have the number 0.974678 and I choose to stay with 3 decimal
> places to have as ouput 0.974.

Hello:

Try the following

  trunc.dig <- function(x, digits) trunc(x*10^digits)/10^digits

  trunc.dig(0.974678, 3)

  [1] 0.974

  trunc.dig(10.974999, 3)

  [1] 10.974

Hope this helps.

Petr Savicky.