[R] Numbers with correct significant digits

[Andrew Robinson]

I have found that sprintf gets this right, although the syntax of the
command itself is a little less clear.

> sprintf("%.2f", 9.6996)
[1] "9.70" 

I hope that this helps,

Andrew

On Fri, Nov 17, 2006 at 02:14:58PM -0800, RMan54 wrote:
> 
> This, for example:
> 
> v  <- c(9.6996, 99.99)
> formatC(v, digits=3, format="g")
> 
> shows:
> 
> " 9.7" " 100"
> 
> This is scientifically incorrect for the first number in the sense that I
> like to show all 3 significant digits, including trailing zero's.
> Is there a way that the first number would show as " 9.70"?
> 
> By the way, can't use format() since it applies the same numbers of digits
> after the decimal point for all numbers in the vector.
> 
> Thanks,
> Rene
> 
> -- 
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-- 
Andrew Robinson  
Department of Mathematics and Statistics            Tel: +61-3-8344-9763
University of Melbourne, VIC 3010 Australia         Fax: +61-3-8344-4599
http://www.ms.unimelb.edu.au/~andrewpr
http://blogs.mbs.edu/fishing-in-the-bay/