xyVector {splines} | R Documentation |

## Construct an xyVector Object

### 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.

### Usage

xyVector(x, y)

### Arguments

`x` |
a numeric vector |

`y` |
a numeric vector of the same length as `x` |

### 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 Venables

### Examples

ispl <- interpSpline( weight ~ height, women )
weights <- predict( ispl, seq( 55, 75, len = 51 ))
class( weights )
plot( weights, type = "l", xlab = "height", ylab = "weight" )
points( women$height, women$weight )
weights

[Package

*splines* version 2.1.0

Index]