scatter.smooth {stats} | R Documentation |
Plot and add a smooth curve computed by loess
to a scatter plot.
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, ...)
x, y |
the |
span |
smoothness parameter for |
degree |
degree of local polynomial used. |
family |
if |
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 |
lpars |
loess.smooth
is an auxiliary function which evaluates the
loess
smooth at evaluation
equally spaced points
covering the range of x
.
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).
loess
; smoothScatter
for scatter plots
with smoothed density color representation.
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)))