deinput">[U,V] = example2_extract(m,n,k,out.X);
norm(Data.A-U*V')/norm(Data.A)
</pre><pre class="codeoutput">
ans =

   5.4828e-06

</pre><p><hr></p><h2 id="20">References</h2><p>[1] Fletcher, R. &amp; Reeves, C.M. (1964). Function minimization by conjugate gradients. <i>The Computer Journal</i>, 7, 149-154.</p><p>[2] Hestenes, M. R. and Stiefel, E. (1952). Methods of conjugate gradients for solving linear systems. <i>J. Res. Nat. Bur. Standards Sec. B.</i>, 48, 409-436.</p><p>[3] Nocedal, J. and Wright S. 