title: combine matrix and sparse matrix
body: <p>How can you add a 1-column matrix to a sparse matrix, or add a sparse matix to a column matrix (either way)? It shouldn't replace the data, just join it into one data type.</p>
  
  <p>The sparse matrix:</p>
  
  <pre><code>&gt;&gt;print type(X)
  &gt;&gt;print X.shape
  &lt;class 'scipy.sparse.csr.csr_matrix'&gt;
  (53, 6596)
  </code></pre>
  
  <p>The column to add:</p>
  
  <pre><code>&gt;&gt;print type(Y)
  &gt;&gt;print Y.shape
  &lt;class 'numpy.matrixlib.defmatrix.matrix'&gt;
  (53, 1)
  </code></pre>
  
  <p>How can you do this?</p>