Construct an xyVector object
Usage
xyVector(x, y)
Arguments
x
|
a numeric vector
|
y
|
a numeric vector of the same length as x
|
Description
Create an object to represent a set of x-y pairs. The resulting
object can be treated as a matrix or as a data frame or as a vector.
When treated as a vector it reduces to the y
component only.
The result of functions such as predict.spline
is returned as
an xyVector
object so the x-values used to generate the
y-positions are retained, say for purposes of generating plots.
Value
An object of class xyVector
with components
x
|
a numeric vector
|
y
|
a numeric vector of the same length as x
|
Author(s)
Douglas Bates and Bill VenablesExamples
data( women )
ispl <- interpSpline( weight ~ height, women )
weights <- predict( ispl, seq( 55, 75, len = 51 ))
class( weights )
plot( weights )
weights