<p>The QUIC-SVD method doesn't work if <code>m = n</code>, however as pointed out in the paper <strong>QUIC-SVD: Fast SVD Using Cosine Trees</strong>:</p>
<blockquote>
<p>Throughout this paper we assume m ≥ n, such that sampling rows gives bigger speedup than sampling columns.</p>
</blockquote>
<p>it should work. One problem is that the CosineNodeSplit(); returns <code>if numColumns < 2</code> so the upcoming operations result in an error:</p>
<pre><code>// Split the node into left and right children.
currentNode->CosineNodeSplit();
// Obtain pointers to the left and right children of the current node.
CosineTree *currentLeft, *currentRight;
currentLeft = currentNode->Left();
currentRight = currentNode->Right();
</code></pre>
<p>Right now, I can't see an easy fix, without changing some bigger parts of the code. Maybe someone else has a simple idea? Maybe <a href="https://github.com/siddharth-agrawal" class="user-mention">@siddharth-agrawal</a> has an idea?</p>
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