R: Evaluate a Spline Basis

predict.bs {splines} | R Documentation

## Evaluate a Spline Basis

### Description

Evaluate a predefined spline basis at given values.

### Usage

    ## S3 method for class 'bs'
    predict(object, newx, ...)

    ## S3 method for class 'ns'
    predict(object, newx, ...)

### Arguments

`object` | the result of a call to `bs` or `ns` having attributes describing `knots`, `degree`, etc.
`newx` | the `x` values at which evaluations are required.
`...` | Optional additional arguments. At present no additional arguments are used.

### Value

An object just like `object`, except evaluated at the new values of `x`.

These are methods for the generic function `predict` for objects inheriting from classes `"bs"` or `"ns"`. See `predict` for the general behavior of this function.

### See Also

`bs`, `ns`, `poly`.

### Examples

    require(stats)
    basis <- ns(women$height, df = 5)
    newX <- seq(58, 72, length.out = 51)
    # evaluate the basis at the new data
    predict(basis, newX)

[Package splines version 2.15.1 Index]