R: 2-dimentional Radial Spline

sp2d {cplm} | R Documentation

## 2-dimentional Radial Spline

### Description

2-dimentional radial spline generator used in `cpglmm`

### Usage

    sp2d(x1, x2, k = max(20, min(length(x1)/4, 150)), by = NULL,
    allPen = FALSE, varying = NULL, diag = FALSE,
    knots1 = quantile(x1, probs = 1:k/(k + 1)),
    knots2 = quantile(x1, probs = 1:k/(k + 1)))

### Arguments

`x1` | the first covariate in the coordinate
`x2` | the second covariate in the coordinate
`k` | number of knots
`by` | not used. This is just for compatibility with `amer`.
`allPen` | not used. This is just for compatibility with `amer`.
`varying` | not used. This is just for compatibility with `amer`.
`diag` | not used. This is just for compatibility with `amer`.
`knots1` | vector of knot locations for the first covariate in the coordinate
`knots2` | vector of knot locations for the second covariate in the coordinate

### Author(s)

Fabian Scheipl fabian.scheipl@googlemail.com

[Package cplm version 0.7-8 Index]