R: Convert spline basis instances to 'data.frame'

fortify.basis {ggfortify} | R Documentation

## Convert spline basis instances to `data.frame`

### Description

Convert spline basis instances to `data.frame`

### Usage

    ## S3 method for class 'basis'
    fortify(model, data, n = 256, ...)

### Arguments

`model` | spline basis object
`data` | x-values at which to evaluate the splines. Optional. By default, an evenly spaced sequence of 256 values covering the range of the splines will be used.
`n` | If data is not provided, instead use an evenly-spaced sequence of x-values of this length (plus one, since both endpoints are included). If data is provided, this argument is ignored.
`...` | other arguments passed to methods

### Value

data.frame with 3 columns: Spline (character), x (numeric), and y (numeric); giving the interpolated x and y values for each of the splines in the basis.

### Examples

    library(splines)
    x <- seq(0, 1, by=0.001)
    spl <- bs(x, df=6)
    fortify(spl)

[Package ggfortify version 0.4.3 Index]