stacked_term | R Documentation |
Creates a basis matrix consisting of different types of terms. E.g. to create a varying-coefficient.
stacked_term(...)
... |
term objects from the package. |
A list with an element called eval
to evaluate the basis. See VAJointSurv-terms
.
poly_term
, bs_term
, ns_term
, and
weighted_term
.
vals <- c(0.41, 0.29, 0.44, 0.1, 0.18, 0.65, 0.29, 0.85, 0.36, 0.47) spline_basis1 <- ns_term(vals, df = 3) spline_basis2 <- bs_term(vals, df = 3) # create stacked term from two spline bases stacked_basis <- stacked_term(spline_basis1, spline_basis2) # evaluate stacked basis at 0.5 stacked_basis$eval(0.5) # evaluate first derivative of stacked basis at 0.5 stacked_basis$eval(0.5, der = 1)
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