i.spline.x: i_spline basis
In SPREDA: Statistical Package for Reliability Data Analysis

Description Usage Arguments Details Value Author(s) References See Also Examples

Create the i_th splines basis for I_splines basis or C_splines basis

1	i.spline.x(xx, tt, i, k, delta = 1e-04, Cs = F)

`xx`	values of of covariate
`tt`	values of knot sequence of the covariate
`i`	I_th splines basis
`k`	degree of the spline
`delta`	the length of the spans to split the range of covariate
`Cs`	indicator of whether the creation of C_splines basis is needed

Creation of the i_th splines basis for I_splines basis or C_splines basis

i.spline.x returns a vector of i_th splines basis for covariate values xx in knots i and degree k

Yili Hong

Hong. Y., Y. Duan, W. Q. Meeker, D. L. Stanley, and X. Gu (2014), Statistical Methods for Degradation Data with Dynamic Covariates Information and an Application to Outdoor Weathering Data, Technometrics, DOI: 10.1080/00401706.2014.915891.

m.spline.x

i.spline.x(xx=runif(20), tt=c(0, 0, 0, 0.3, 0.6, 0.8, 1, 1, 1 ), i=3, k=3, 
delta = 1e-04, Cs = FALSE)
i.spline.x(xx=runif(20), tt=c(0, 0, 0, 0.3, 0.6, 0.8, 1, 1, 1 ), i=3, k=3, 
delta = 1e-04, Cs = TRUE)