Convert class 'pandas.indexes.numeric.Int64Index' to numpy : <p>I am isolating some row ids from a Pandas dataframe, like this: </p>

<pre><code>data = df.loc[df.cell == id]
rows = df.index

print(type(rows))
&lt; class 'pandas.indexes.numeric.Int64Index'&gt;
</code></pre>

<p>I want to convert rows to a numpy array so I can save it to a mat file using sio.savemat. This is returning an error though:</p>

<pre><code>row_mat = rows.as_matrix()
AttributeError: 'Int64Index' object has no attribute 'as_matrix'
</code></pre>

<p>What is the correct way, please? Thanks</p>
