R Graphical Manual

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Last data update: 2014.03.03

R: A spaghetti plot of grouped data

linesplot

R Documentation

A spaghetti plot of grouped data

Description

Orders the observations by x and thereafter plots y on x and connects observations of the same group by lines. Useful, for example, to plot a longitudinal dataset.

Usage

linesplot(x, y, group, xlab = "x", ylab = "y", 
          main = "", cex = 0.5, pch = 19, col = 1, col.lin = 1, 
          lw = FALSE, ylim = NULL, xlim = NULL, add = FALSE, lty = "solid", lwd=1)

Arguments

`x, y`	Numerical vectors of the same length including the x and y variables.
`group`	The variable specifying the group. Should be of the same length as vectors x and y.
`xlab, ylab, main, cex, pch, col, col.lin, xlim, ylim, lty, lwd`	Graphical parameters, see `par`
`lw`	Boolean. Whether a loess smoother to be added onto the plot.
`add`	Boolean. Whether to add to an existing plot or to open a new window.

Details

The observations within the group are connected at the increasing order of x.

Value

Used for its side effects.

Author(s)

Lauri Mehtatalo

References

For graphs using this function, see e.g., Mehtatalo, L. 2004. A longitudinal height-diameter model for Norway spruce in Finland. Canadian Journal of Forest Research 34(1): 131-140. Mehtatalo, L. 2005. Height-diameter models for Scots pine and birch in Finland. Silva Fennica 39(1): 55-66.

Examples

D<-rep(seq(10,30),10)
H<-(20+rep(rnorm(10,0,0.5),each=21))*exp(-1.5*D^(-1.3))
plot<-rep(1:10,each=21)
linesplot(D,H,plot)