dm_Rdate_Eti {baker} | R Documentation |
Make etiology design matrix for dates with R format.
Description
dm_Rdate_Eti
creates design matrices for etiology regressions.
Usage
dm_Rdate_Eti(Rdate, Y, num_knots_Eti, basis_Eti = "ncs")
Arguments
Rdate |
a vector of dates of R format |
Y |
binary case/control status; 1 for case; 0 for controls |
num_knots_Eti |
number of knots for etiology regression |
basis_Eti |
the type of basis functions to use for etiology regression. It can be "ncs" (natural cubic splines) or "tprs" (thin-plate regression splines). Default is "ncs". "tprs" will be implemented later. |
Details
It is used in model_options$likeihood$Eti_formula
. For example, one can specify
it as:
~ AGECAT+HIV+dm_Rdate_Eti(ENRLDATE,Y,5)
to call an etiology regression with intercept, main effects for 'AGECAT' and 'HIV', and
natural cubic spline bases for 'ENRLDATE' using 5 knots defined as 5 equal-probability-spaced
sample quantiles.
Value
Design matrix for etiology regression:
-
Z_Eti
transformed design matrix for etiology regression