ege, London, M.Sc. exercise sheet.
</p>


<h3>References</h3>

<p>Venables, W. N. and Ripley, B. D. (2002)
<em>Modern Applied Statistics with S.</em> Fourth edition.  Springer.
</p>


<h3>Examples</h3>

<pre><code class='language-R'>options(contrasts = c("contr.sum", "contr.poly"))
npk.aov &lt;- aov(yield ~ block + N*P*K, npk)
## IGNORE_RDIFF_BEGIN
npk.aov
summary(npk.aov)
alias(npk.aov)
coef(npk.aov)
options(contrasts = c("contr.treatment", "contr.poly"))
npk.aov1 &lt;- aov(yield ~ block + N + K, data = np