[R] factorial(), modulus()

[Bill Venables]

> On Thu, 6 Jul 2000, Pete Hurd wrote:
> 
> > Dear R friends,
> > 
> > I was wondering if there were factorial and modulus functions out there
> > that I've somehow overlooked?
> 
> There's  gamma and lgamma for factorials
> 
> gamma(x+1) is x! and lgamma(x+1) is log(x!).  Also choose() and
> lchoose() for the binomial coefficients.
> 
> x %% y does x mod y.
> 

Isn't that the "modulo" function?  The modulus function I have always
thought to be the extension of abs() that covers complex numbers, i.e.
Mod():

> Mod(3+4*1i)
[1] 5

Anyway, they are both there...

Bill.


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