[R] summary(difftime(...))

[Jim Lemon]

I M S White wrote:
> Is there any way to get a numerical summary of the values of a difftime
> object? E.g.
>
> TimeToWean <- difftime(WeanDate, BirthDate, units = "days")
>
> I can repeat
>
> sum(TimeToWean == 20)
>
> with as many other values are needed to build up a frequency table,
> but is there a simpler way in R version 1.8.1?
>
perhaps tabulate() will do what you want. For a somewhat more expansive 
output, you might look at the freq() function in "Kickstarting R" which can 
be browsed online at:

http://cran.r-project/doc/contrib/Lemon-kickstart/index.html

see the section "Frequencies".

Jim