[R] y axis on hist

[Bud Gibson]

Hi:

The y axis on the hist function seems to set its limits oddly. 
sometimes, it covers the full range of the data and sometimes it stops 
one major tick short.  I have had this behavior with a variety of data 
sets, and it can easily be reproduced by just running the following 
several times:

hist(rnorm(100000))

I have tried explicitly setting ylim to the range of values produced by 
rnorm (taking care to set some variable to rnorm(100000) and then 
graphing that), and I still get the y axis plotting behvior I just 
described.

TIA,
Bud