Draws bars relevant to breakpoint estimates (point estimate and confidence limits) on the current device
# S3 method for segmented
lines(x, term, bottom = TRUE, shift=TRUE, conf.level = 0.95, k = 50,
pch = 18, rev.sgn = FALSE, ...)
an object of class segmented
.
the segmented variable of the breakpoints being drawn. It may be unspecified when there is a single segmented variable.
logical, indicating if the bars should be plotted at the bottom (TRUE
) or at the top (FALSE
).
logical, indicating if the bars should be `shifted' on the y-axis before plotting. Useful for multiple breakpoints with overlapped confidence intervals.
the confidence level of the confidence intervals for the breakpoints.
a positive integer regulating the vertical position of the drawn bars. See Details.
either an integer specifying a symbol or a single character to be used
in plotting the point estimates of the breakpoints. See points
.
should the signs of the breakpoint estimates be changed before plotting? see Details.
further arguments passed to segments
, for instance `col' that
can be a vector.
lines.segmented
simply draws on the current device the point estimates and relevant
confidence limits of the estimated breakpoints from a "segmented" object. The y coordinate
where the bars are drawn is computed as usr[3]+h
if bottom=TRUE
or
usr[4]-h
when bottom=FALSE
, where h=(usr[4]-usr[3])/abs(k)
and
usr
are the extremes of the user coordinates of the plotting region.
Therefore for larger values of k
the bars are plotted on the edges.
The argument rev.sgn
allows to change the sign of the breakpoints before plotting. This may
be useful when a null-right-slope constraint is set.
plot.segmented
to plot the fitted segmented lines, and
points.segmented
to add the fitted joinpoints.