Create a One-Dimensional Basis for INLA

Description

This function is a wrapper around onebasis to create a one-dimensional basis for spline modeling. This wrapper enhances the original function by allowing users to specify a custom prefix for the column names using the basis_name argument, such that each set of basis variables can be easily identified in the model formula by the INLA framework.

onebasis_inla(covariate, fun, basis_name, ...)

Arguments

  • covariate: A numeric vector representing the covariate
  • fun: A character string specifying the shape function to be used by onebasis.
  • basis_name: A character string giving a base name for the columns in the resulting basis matrix. The default prefix (usually "b") is replaced by this string.
  • ...: Additional arguments passed to onebasis, such as degree, df, knots, etc.

Returns

An object of class "onebasis", as returned by onebasis, with column names modified according to basis_name.

Examples

# Import example data set
data("dengue_MS")

# Build a one-dimensional spline basis with a custom name
ob_inla <- onebasis_inla(
 covariate = dengue_MS$tmin,
 fun = "bs",
 basis_name = "tempBasis",
 degree = 2
)

# Check class of the one-basis object
class(ob_inla)

# View first rows of the one-basis matrix
head(ob_inla)