D.designdata: Construct Density Design Data
Usage
D.designdata (mask, Dmodel, grps, sessionlevels, sessioncov = NULL)
Arguments
Dmodel
formula for density model
grps
vector of group names
sessionlevels
vector of character values for session names
sessioncov
optional dataframe of values of session-specific covariate(s).
Value
- Dataframe with one row for each combination of mask point, group and
session. The dataframe has an attribute 'dimD' that gives the relevant
dimensions:
attr(dframe, 'dimD') = c(nmask, ngrp, R), where
nmask is the number of mask points, ngrp is the number of
groups, and R is the number of sessions. Columns correspond to
predictor variables in Dmodel.
Details
This is an internal secr function that you are unlikely ever to
use. Unlike secr.design.MS, this function does not
call model.matrix.