hecks and exceptions</h3>
<p>Function argument and return types are not themselves checked for dimensionality. A matrix of any size may be passed in as a matrix argument. Nevertheless, a user-defined function might call a function (such as a multivariate normal density) that itself does dimensionality checks.</p>
<p>Dimensions of function return values will be checked if they’re assigned to a previously declared variable. They may also be checked if they are used as the argument to a function.</p>
<p>Any 