| plot.Lexis {Epi} | R Documentation |
The follow-up histories represented by a Lexis object can be plotted using one or two dimensions. The two dimensional plot is a Lexis diagram showing follow-up time simultaneously on two time scales.
## S3 method for class 'Lexis': plot(x, time.scale = NULL, breaks="lightgray", ...) ## S3 method for class 'Lexis': points(x, time.scale = NULL, ...) ## S3 method for class 'Lexis': lines(x, time.scale = NULL, ...)
x |
An object of class Lexis |
time.scale |
A vector of length 1 or 2 giving the time scales to be plotted either by name or numerical order |
breaks |
a string giving the colour of grid lines to be drawn
when plotting a split Lexis object. Grid lines can be suppressed by
supplying the value NULL to the breaks argument |
... |
Further graphical parameters to be passed to the plotting
methods. Grids can be drawn using the followin parameters in plot:
|
The plot method for Lexis objects traces ``life lines'' from
the start to the end of follow-up. The points method plots
points at the end of the life lines.
If time.scale is of length 1, the life lines are drawn
horizontally, with the time scale on the X axis and the id value on the Y
axis. If time.scale is of length 2, a Lexis diagram is
produced, with diagonal life lines plotted against both time scales
simultaneously.
If lex has been split along one of the time axes by a call to
splitLexis, then vertical or horizontal grid lines are plotted
at the break points.
Martyn Plummer