[R] Number of digits to display?

[Judson]

How do I control the number of digits to display, 
say, in a matrix, without rounding or losing accuracy
in subsequent calculations?     
round() of course reduces accuracy.   

Also, if all my results
are really fractions, is there a way to display 
them as fractions of integers rather than 
decimal expressions?   

................... judson blake
 		 	   		  
	[[alternative HTML version deleted]]