[R] specify the number of decimal numbers

[Wacek Kusnierczyk]

jim holtman wrote:
> Depending on what you want to do, use 'sprintf':
>
>   
>> x <- 1.23456789
>> x
>>     
> [1] 1.234568
>   
>> as.character(x)
>>     
> [1] "1.23456789"
>   
>> sprintf("%.1f  %.3f  %.5f", x,x,x)
>>     
> [1] "1.2  1.235  1.23457"
>   
>
>   
... but remember that sprintf introduces excel bugs into r (i.e.,
rounding is not done according to the  IEC 60559 standard, see ?round):

    ns = c(0.05, 0.15)
    round(ns, 1)
    # 0.0 0.2
    as.numeric(sprintf('%.1f', ns))
    # 0.1 0.1

vQ