[R] How do I format something as "0.000"?

[Achim Zeileis]

On Mon, 17 Jan 2005 16:49:35 +0100 (MET) Christian Hennig wrote:

> Hi,
> 
> I would like to use the format function to get numbers all with three 
> digits to the right of the decimal point, even in cases where there is
> no significant digit left. For example, I would like to get
> c(0.3456789,0.0000053) as "0.346" "0.000".
> It seems that it is not possible to force format to print a "0.000",
> i.e. without any significant decimal places.
> Is it possible to do this somehow in R?

You can round() before:

R> x <- c(0.3456789,0.0000053)
R> round(x, digits = 3)
[1] 0.346 0.000
R> format(round(x, digits = 3))
[1] "0.346" "0.000"

hth,
Z

> Thanks,
> Christian
> 
> 
> *********************************************************************
> ** Christian Hennig
> Fachbereich Mathematik-SPST/ZMS, Universitaet Hamburg
> hennig at math.uni-hamburg.de,
> http://www.math.uni-hamburg.de/home/hennig/
> #####################################################################
> ###
> ich empfehle www.boag-online.de
> 
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