scatter.smooth

From stats v3.2.5 by R-core R-core@R-project.org

Scatter Plot with Smooth Curve Fitted by Loess

Plot and add a smooth curve computed by loess to a scatter plot.

Keywords: smooth

Usage

scatter.smooth(x, y = NULL, span = 2/3, degree = 1, family = c("symmetric", "gaussian"), xlab = NULL, ylab = NULL, ylim = range(y, pred$y, na.rm = TRUE), evaluation = 50, ..., lpars = list())
loess.smooth(x, y, span = 2/3, degree = 1, family = c("symmetric", "gaussian"), evaluation = 50, ...)

Arguments

x, y: the x and y arguments provide the x and y coordinates for the plot. Any reasonable way of defining the coordinates is acceptable. See the function xy.coords for details.
span: smoothness parameter for loess.
degree: degree of local polynomial used.
family: if "gaussian" fitting is by least-squares, and if family = "symmetric" a re-descending M estimator is used. Can be abbreviated.
xlab: label for x axis.
ylab: label for y axis.
ylim: the y limits of the plot.
evaluation: number of points at which to evaluate the smooth curve.
...: For scatter.smooth(), graphical parameters, passed to plot() only. For loess.smooth, control parameters passed to loess.control.
lpars: a list of arguments to be passed to lines().

Details

loess.smooth is an auxiliary function which evaluates the loess smooth at evaluation equally spaced points covering the range of x.

Value

For scatter.smooth, none.For loess.smooth, a list with two components, x (the grid of evaluation points) and y (the smoothed values at the grid points).

Examples

library(stats)

require(graphics)

with(cars, scatter.smooth(speed, dist))
## or with dotted thick smoothed line results :
with(cars, scatter.smooth(speed, dist, lpars =
                    list(col = "red", lwd = 3, lty = 3)))

Documentation reproduced from package stats, version 3.2.5, License: Part of R 3.2.5

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