\code{dbdTime} is for time-varying \code{lambda} and \code{mu}
specified as \R functions.
- Only \code{dyule} is vectorized simultaneously on its three arguments
+ \code{dyule} is vectorized simultaneously on its three arguments
\code{x}, \code{lambda}, and \code{t}, according to \R's rules of
- recycling arguments. The two others are vectorized only on \code{x};
- the other arguments are eventually shortened with a warning if
- necessary.
+ recycling arguments. \code{dbd} is vectorized simultaneously \code{x}
+ and \code{t} (to make likelihood calculations easy), and
+ \code{dbdTime} is vectorized only on \code{x}; the other arguments are
+ eventually shortened with a warning if necessary.
The returned value is, logically, zero for values of \code{x} out of
range, i.e., negative or zero for \code{dyule} or if \code{conditional