title: init a COO matrix from its attributes (data,row,col)
body: <p>I have a script that computes the three attributes of the COO format:</p>
  
  <pre><code>data    COO format data array of the matrix
  row     COO format row index array of the matrix
  col     COO format column index array of the matrix
  </code></pre>
  
  <p>And i want to use these three arrays to initialise a coo_matrix() in order to use the methods available to the coo_matrix class. What would be the fastest way to do that without changing the main script? </p>