survPen: crs – R documentation

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crs

Bases for cubic regression splines (equivalent to "cr" in mgcv)

Builds the design matrix and the penalty matrix for cubic regression splines.

crs(x, knots = NULL, df = 10, intercept = TRUE)

`x`	Numeric vector
`knots`	Numeric vectors that specifies the knots of the splines (including boundaries); default is NULL
`df`	numeric value that indicates the number of knots desired (or degrees of freedom) if knots=NULL; default is 10
`intercept`	if FALSE, the intercept is excluded from the basis; default is TRUE

See package mgcv and section 4.1.2 of Wood (2006) for more details about this basis

List of three elements

`bs`	design matrix
`pen`	penalty matrix
`knots`	vector of knots (specified or calculated from `df`)

Wood, S. N. (2006), Generalized additive models: an introduction with R. London: Chapman & Hall/CRC.

x <- seq(1,10,length=100)
# natural cubic spline with 3 knots
crs(x,knots=c(1,5,10))

Multidimensional Penalized Splines for Survival and Net Survival Models

v1.5.1

GPL-3 | file LICENSE

Authors

Mathieu Fauvernier [aut, cre], Laurent Roche [aut], Laurent Remontet [aut], Zoe Uhry [ctb], Nadine Bossard [ctb]

Initial release