R help - Oct 2011 - round() and negative digits

Just wondering here -- I tested and found to my delight that

%  round(325.4,-2)
[1] 300

gave me exactly what I would have expected (and wanted).  Since it's not 
explicitly mentioned in the documentation that negative 'digits' is 
allowed, I just wanted to ask whether this behavior is intentional or a 
happy turn of events.  I'm always paranoid that something not explicitly 
documented might disappear in future revisons.

thanks
Carl

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Sent from my Cray XK6

On 11-10-07 5:26 PM, Carl Witthoft wrote:
> Just wondering here -- I tested and found to my delight that
>
> %  round(325.4,-2)
> [1] 300
>
> gave me exactly what I would have expected (and wanted).  Since it's
not
> explicitly mentioned in the documentation that negative 'digits' is
> allowed, I just wanted to ask whether this behavior is intentional or a
> happy turn of events.  I'm always paranoid that something not
explicitly
> documented might disappear in future revisons.
>
It is intentional, and one of the regression tests confirms that it's 
there, so it won't disappear by mistake, and would be very unlikely to 
disappear intentionally.

Duncan Murdoch