splineKnots
Knot Vector from a Spline
Description
Gets the knot vector from a spline.
Usage
# Generic function
splineKnots(object)
## S3 method for class 'spline':
splineKnots(object)
Arguments
| object |
any object inheriting from class "spline".
|
Details
splineKnots is a generic function to get the knots. Currently, only the invisible
method splineKnots.spline is implemented for class "spline".
There is no default method.
Value
returns the knot vector of a spline.
See Also
Examples
x <- c(1, 2, 3, 8, 20)
y <- log(x)
# piecewise polynomial representation has knots at 'x'
psp <- interpSpline(x, y, bSpline=FALSE)
splineKnots(psp)
# B-spline representation has extra knots
bsp <- interpSpline(x, y, bSpline=TRUE)
splineKnots(bsp)