bs_term | R Documentation |
Term for a B-Spline Basis for Polynomial Splines
bs_term( x = numeric(), df = NULL, knots = NULL, degree = 3, intercept = FALSE, Boundary.knots = range(if (use_log) log(x) else x), use_log = FALSE )
x, df, knots, degree, intercept, Boundary.knots |
same as |
use_log |
|
A list like bs
with an additional element called eval
to evaluate the basis. See VAJointSurv-terms
.
poly_term
, ns_term
, weighted_term
,
and stacked_term
.
vals <- c(0.41, 0.29, 0.44, 0.1, 0.18, 0.65, 0.29, 0.85, 0.36, 0.47) spline_basis <- bs_term(vals,df = 3) # evaluate spline basis at 0.5 spline_basis$eval(0.5) # evaluate first derivative of spline basis at 0.5 spline_basis$eval(0.5, der = 1)
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