[R] Chron format question h:m not working

[Stephen Sefick]

R 2.12.2 on Scientific Linux 6.4

#works
chron(times.="15:00:00", format=c(times="h:m:s"))

#doesn't work
chron(times.="15:00", format=c(times="h:m"))

 From chron Manual:
The times format can be any permutation of "h", "m", and "s" separated 
by any one non-special character. The default is "h:m:s".

what am I missing?

many thanks,


-- 
Stephen Sefick
**************************************************
Auburn University
Biological Sciences
331 Funchess Hall
Auburn, Alabama
36849
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sas0025 at auburn.edu
http://www.auburn.edu/~sas0025
**************************************************

Let's not spend our time and resources thinking about things that are so 
little or so large that all they really do for us is puff us up and make 
us feel like gods.  We are mammals, and have not exhausted the annoying 
little problems of being mammals.

                                 -K. Mullis

"A big computer, a complex algorithm and a long time does not equal 
science."

                               -Robert Gentleman