TITLE(trace @@ Trace all calls to a function.)
USAGE(
trace(fun)
untrace(fun)
)
ALIAS(trace)
ALIAS(untrace)
ARGUMENTS(
ARG(fun @@ any interpreted R function (not quoted).)
)
DESCRIPTION(
These are both in very primitive form. 
If LANG(trace) is called the function named is marked and each time it
is entered the call is printed on the console.
To stop tracing a function use LANG(untrace).
)
SEEALSO(
LANG(LINK(debug)).
)
EXAMPLES(
trace(names)
data.frame(x=1:2, y=3:4)
untrace(names)
)
