scatter.smooth(modreg)R Documentation

Scatter Plot with Smooth Curve Fitted by Loess

Description

Plot (scatter.smooth) and add a smooth curve computed by loess to a scatter plot. loess.smooth is an auxiliary function used by the other two.

Usage

scatter.smooth(x, y, span=2/3, degree=1,
    family=c("symmetric", "gaussian"),
    xlab=deparse(substitute(x)), ylab=deparse(substitute(y)),
    evaluation=50, ...)
loess.smooth(x, y, span=2/3, degree=1,
    family=c("symmetric", "gaussian"), zero.line=F, evaluation=50, ...)

Arguments

x x coordinates for scatter plot.
y y coordinates for scatter plot.
span smoothness parameter for loess.
degree degree of local polynomial used.
family if family="gaussian" fitting is by least-squares, and if family="symmetric" a re-descending M estimator is used.
xlab label for x axis.
ylab label for y axis.
zero.line logical for plotting a horizontal line at zero – used for residual plots.
evaluation number of points at which to evaluate the smooth curve.
... graphical parameters.

Value

None.

Author(s)

B.D. Ripley

See Also

loess

Examples

data(cars)
attach(cars)
scatter.smooth(speed, dist)
detach()

[Package Contents]