Function to plot multiple growth curves indexed by subject id.
Usage
mplot(x, y, id, data = parent.frame(), subset = NULL, add = FALSE, ...)
Arguments
x
vector of x coordinates.
y
vector of y coordinates.
id
factor denoting subject levels.
data
optional dataframe containing x, y and id.
subset
optional logical defining a subset of rows in data.
add
optional logical defining whether the plot is pre-existing (TRUE) or new (FALSE).
...
Further graphical parameters (see par) may also be supplied as arguments,
particularly background colour bg, character expansion cex, colour col, line type lty
Details
The arguments x, y and id can be given as character strings. The
par parameters can be functions of vector variables in data, e.g. to
colour curves separately by id use: col = id.