<<echo=FALSE, results=hide>>=
dat <- matrix(c(
  "lm",           "least-squares regression",
  "glm",          "Poisson regression",
  "glm",          "logistic regression",
  "glm.nb",       "negative binomial regression",
  "model.matrix", "extracting the regressor matrix from a fitted (generalized) linear model object",
  "coef",         "extracting the estimated coefficients from a fitted (generalized) linear model object",
  "vcov",         "extracting the estimated covariance matrix from a fitted (generalized) linear model object",
  "logLik",       "extracting the fitted log-likelihood from a fitted (generalized) linear model object"),
  nrow = 2
)
i <- sample(1:ncol(dat), 1) 
fun <- dat[1, i]
descr <- dat[2, i]
@

\begin{question}
What is the name of the R function for
\Sexpr{descr}?
\end{question}

\begin{solution}
\texttt{\Sexpr{fun}} is the R function for
\Sexpr{descr}.
See \texttt{?\Sexpr{fun}} for the corresponding manual page.
\end{solution}

%% \extype{string}
%% \exsolution{\Sexpr{fun}}
%% \exname{R functions}