% Generated by roxygen2: do not edit by hand
% Please edit documentation in R/lfebd3.R
\name{lfbd.cf}
\alias{lfbd.cf}
\title{Generate the principal block for a confounded LFBD}
\usage{
lfbd.cf(n, r)
}
\arguments{
\item{n}{Integer. Number of factors.}

\item{r}{Integer. Exponent determining the principal block size, so the
principal block contains `3^r` treatment combinations.}
}
\value{
A matrix representing the principal block.
}
\description{
Extracts the principal block of size `3^r` from a complete 3-level
factorial design using the recursive confounded selection rule.
}
\seealso{
[lfbd.cf.full()], [reduce_repeated()]
}
