Plot longitudinal data

Plot longitudinal data of an object of class jointdata, for a longitudinal variable. It is possible to plot all the subjects in the data set, or just a selected subset. See subset.jointdata.

Usage

# S3 method for class 'jointdata'
plot(x, Y.col, type, xlab, xlim = NULL, ylim = NULL, main = NA, pty, ...)

Arguments

x

object of class jointdata.

Y.col

column number, or column name, of longitudinal variable to be plotted. Defaults to Y.col = NA, plotting all longitudinal variables.

type

the type of line to be plotted, see plot for further details.

xlab

a title for the x-axis, see title.

xlim, ylim

numeric vectors of length 2, giving the x and y coordinates ranges, see plot.window for further details.

main

an overall title for the plot; see title.

pty

a character specifying the type of plot region to be used, see par for details.

...

other graphical arguments; see plot.

Value

A graphical device with a plot for longitudinal data.

See also

lines and points.

Author

Ines Sousa

Examples

data(heart.valve)
heart.surv <- UniqueVariables(heart.valve,
                              var.col = c("fuyrs", "status"),
                              id.col = "num")
heart.long <- heart.valve[, c(1, 4, 5, 7, 8, 9, 10, 11)]
heart.jd <- jointdata(longitudinal = heart.long,
                      survival = heart.surv,
                      id.col = "num",
                      time.col = "time")
plot(heart.jd, Y.col = "grad", col = "grey")