an
xyplot of the semi-variogram versus the distances is
produced. If
smooth = TRUE, a
loess smoother is added to
the plot. If
showModel = TRUE and
object includes an
modelVariog
attribute, the corresponding semi-variogram
is added to the plot.
an object inheriting from class
Variogram,
consisting of a data frame with two columns named
variog and
dist, representing the semi-variogram values and the corresponding
distances.
OPTIONAL ARGUMENTS:
smooth
an optional logical value controlling whether a
loess smoother should be added to the plot. Defaults to
TRUE, when
showModel is
FALSE.
showModel
an optional logical value controlling whether the
semi-variogram corresponding to an
"modelVariog" attribute of
object, if any is present, should be added to the
plot. Defaults to
TRUE, when the
"modelVariog"
attribute is present.
sigma
an optional numeric value used as the height of a
horizontal line displayed in the plot. Can be used to represent the
process standard deviation. Default is
NULL, implying that no
horizontal line is drawn.
span
an optional numeric value with the smoothing parameter for
the
loess fit. Default is 0.6.
xlab,ylab
optional character strings with the x- and y-axis
labels. Default respectively to
"Distance" and
"SemiVariogram".
type
an optional character indicating the type of plot. Defaults to
"p".
ylim
an optional numeric vector with the limits for the
y-axis. Defaults to
c(0, max(object$variog)).
...
optional arguments passed to the Trellis
xyplot function.
VALUE:
an
xyplot Trellis plot.
SEE ALSO:
,
,
EXAMPLES:
fm1 <- lme(follicles ~ sin(2*pi*Time) + cos(2*pi*Time), Ovary)
plot(Variogram(fm1, form = ~ Time | Mare, maxDist = 0.7))