Message-ID: <429B4B72.9000109@stats.uwo.ca>
Date: 2005-05-30T17:20:50Z
From: Duncan Murdoch
Subject: Formatting numbers with a limited amount of digits consistently
In-Reply-To: <d7f8op$fa3$1@sea.gmane.org>
Henrik Andersson wrote:
> I have tried to get signif, round and format to display numbers like
> these consistently in a table, using e.g. signif(x,digits=3)
>
> 17.01
> 18.15
>
> I want
>
> 17.0
> 18.2
>
> Not
>
> 17
> 18.2
>
>
> Why is the last digit stripped off in the case when it is zero!
signif() changes the value; you don't want that, you want to affect how
a number is displayed. Use format() or formatC() instead, for example
> x <- c(17.01, 18.15)
> format(x, digits=3)
[1] "17.0" "18.1"
> noquote(format(x, digits=3))
[1] 17.0 18.1
> Is this a "feature" of R or did I miss something?
I'd say both.
Duncan Murdoch