loess.smooth
Smooth Loess Curve

Description

Returns a list of values at which the loess curve is evaluated.

Usage

loess.smooth(x, y, span = 2/3, degree = 1, family = c("symmetric",
    "gaussian"), evaluation = 50, ...)

Arguments

x abscissas of points to be plotted on scatterplot.
y ordinates of points to be plotted on scatterplot. If a point has NA for either coordinate, it will be omitted from the calculations.
span the smoothing parameter.
degree the overall degree of the locally-fitted polynomial. 1 is locally-linear fitting and 2 is locally-quadratic fitting.
family the value is "gaussian" or "symmetric".
  • If "gaussian", local-fitting methods are used.
  • If "symmetric" (the default), local fitting is used together with a robustness feature that guards against distortion by outliers.
evaluation the number of values at which the loess curve is evaluated.
... additional arguments to be passed to loess.control.
Value
returns a list with two components:
x the x values at which the loess curve was evaluated.
y the smoothed values.
See Also
loess.
Examples
x <- runif(100, -3, 3)
eps <- rnorm(100, 0, .1)
y <- sin(x) + eps
loess.smooth(x, y, span = 0.5, degree = 2)
Package stats version 6.1.4-13
Package Index