rough memory (RStan and
PyStan); see their respective manuals for details.<a href="#fn18" class="footnote-ref" id="fnref18"><sup>18</sup></a></p>
<p>All of the variables declared in the <code>data</code> block will be read.
If a variable cannot be read, the program will halt with a message
indicating which data variable is missing.</p>
<p>After each variable is read, if it has a declared constraint, the
constraint is validated. For example, if a variable <code>N</code> is
declared as <code>int&lt;lower=0&gt