Takes a fitted segmented object returned by segmented() and adds
on the current plot the joinpoints of the fitted broken-line relationships.
# S3 method for segmented
points(x, term, interc = TRUE, link = TRUE, rev.sgn=FALSE,
transf=I, ...)an object of class segmented.
the segmented variable of interest. It may be unspecified when there is a single segmented variable.
If TRUE the computed joinpoints include the model intercept (if it exists).
when TRUE (default), the fitted joinpoints are plotted on the link scale
when TRUE, the fitted joinpoints are plotted on the `minus' scale
of the current term variable. This is useful when a null-constraint
has been set on the last slope.
A possible function to convert the fitted values before plotting.
other graphics parameters to pass on to points() function.
We call 'joinpoint' the plane point having as coordinates the breakpoint (on the x scale) and the fitted value of
the segmented relationship at that breakpoint (on the y scale). points.segmented() simply adds the fitted
joinpoints on the current plot. This could be useful to emphasize the changes of the piecewise linear relationship.
plot.segmented to plot the fitted segmented lines.
#see examples in ?plot.segmented
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