[R] Pretty printing numbers

[Peter Langfelder]

On Sun, May 8, 2011 at 4:41 PM, Worik R <worikr at gmail.com> wrote:
> Friends
>
> I am trying to format a number to a string so 2189.745 goes to "2,189.35"
> and 309283.929 goes to "309,283.93"
>
> I have tried to use formatC(X, big.mark=",",drop0trailing=FALSE, format="f")
> but it does not get the number of decimals correct.  Specifying digits does
> not work as that is significant digits.  I could use a switch statement
> switching on the size of the number to be formated to set the digits
> parameter but that is complex and leaves me insecure that thre may be other
> problems I have not uncovered.
>
> Is there a simple way of using library functions to insert big.marks and get
> the number of trailing digits correct?  Perhaps some way of using sprintf?
>

Try this inserting a round() step before the final printing:

x = 309283.929

formatC(round(x, 2), big.mark=",",drop0trailing=TRUE, format="f")

[1] "309,283.93"


HTH,

Peter


> cheers
> Worik
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>



-- 
Sent from my Linux computer. Way better than iPad :)