[R] Setting Number of Displayed Digits

[Rich Shepard]

   Some chemicals have concentrations at or below the method detection limit
(MDL; 'less-thans') of 0.005 mg/L. When I look at the data frame that is how
the concentration is displayed. But, when I ask for a summary() of that data
frame column only 0 is displayed.

   How can I adjust the number of digits displayed by functions such as
summary()?

Rich