parse_cvek_formula: Parsing User-supplied Formula

In CVEK: Cross-Validated Kernel Ensemble

Description

Parsing user-supplied formula to fixed-effect and kernel matrices.

Usage

parse_cvek_formula(
  formula,
  kern_func_list,
  data,
  data_new = NULL,
  verbose = FALSE
)

Arguments

formula	(formula) A user-supplied formula.
kern_func_list	(list) A list of kernel functions in the kernel library
data	(data.frame, n*d) A data.frame, list or environment (or object coercible by as.data.frame to a data.frame), containing the variables in formula. Neither a matrix nor an array will be accepted.
data_new	(data.frame, n_new*d) New data for computing predictions.
verbose	(logical) Whether to print additional messages.

Details

The formula object is exactly like the formula for a GLM except that user can use k() to specify kernel terms. Additionally, user can specify interaction between kernel terms (using either '*' and ':'), and exclude interaction term by including -1 on the RHS of formula.

Value

A list of three slots:

Y	(matrix, n*1) The vector of response variable.
X	(matrix, n*d_fix) The fixed effect matrix.
K	(list of matrices) A nested list of kernel term matrices. The first level corresponds to each base kernel function in kern_func_list, the second level corresponds to each kernel term specified in the formula.

Author(s)

Jeremiah Zhe Liu

CVEK documentation built on Jan. 8, 2021, 5:42 p.m.