- properly to view all lines, and the legend is plotted by default. For
- more flexible settings of line drawings, it is probably better to
- combine \code{ltt.plot()} with successive calls of \code{ltt.lines()}
- (see \code{Examples:}).
+ properly to view all lines, and the legend is plotted by default. The
+ plot will certainly make sense if all trees have their
+ most-distant-from-the-root tips contemporaneous (i.e., trees with only
+ extinct lineages will not be represented properly). For more flexible
+ settings of line drawings, it may be better to combine
+ \code{ltt.plot()} with successive calls of \code{ltt.lines()} (see
+ examples).
+
+ \code{ltt.coplot} is meant to show how to set a tree and a LTT plots
+ on the same scales. All extra arguments modify only the appearance of
+ the tree. The code can be easily edited and tailored.
+}
+\value{
+ \code{ltt.plot.coords} returns a two-column matrix with the time
+ points and the number of lineages, respectively. The \eqn{i}th value
+ of the second column is the number of lineages for the interval
+ defined by the \eqn{(i - 1)}th and the \eqn{i}th values of the first
+ column. These are then plotted with the option \code{type = "S"} by
+ the other functions.