lines.jointdata: Add lines to an existing jointdata plot

Description

Add lines to an existing plot 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

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## S3 method for class 'jointdata'
lines(x, Y.col, ...)

Arguments

x

object of class 'jointdata'

Y.col

column number, or column name, of longitudinal variable to be plotted

...

other graphical arguments

Value

A graphical device with a plot for longitudinal data. Other functions are useful to be used with this as plot and points

Author(s)

Ines Sousa (isousa@math.uminho.pt)

Examples

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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")
# Randomly select a pair of subjects to plot profiles of
take <- sample(1 : max(heart.jd$survival$num), 2)
heart.jd.1 <- subset(heart.jd, take[1])
heart.jd.2 <- subset(heart.jd, take[2])
plot(heart.jd.1, Y.col = 4)
lines(heart.jd.2, Y.col = 4, lty = 2)

Questions? Problems? Suggestions? or email at ian@mutexlabs.com.

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