</pre><pre class="codeoutput">Elapsed time is 2.324888 seconds.
Elapsed time is 0.336457 seconds.
Elapsed time is 0.219211 seconds.
</pre><h2>Summary<a name="20"></a></h2>
         <p>So ... don't use INV, and don't worry about how to use LU, CHOL, or QR factorization.  Just install the FACTORIZE package,
            and you're on your way.  Assuming you are now in the Factorize/ directory, cut-and-paste these commands into your command
            window:
         </p><pre> addpath (pwd)
 savepath</pre><p>