osen</span>
<span class="sd">    number of standard deviations from the mean.</span>

<span class="sd">    These values are most likely wrongly inputted data,</span>
<span class="sd">    and so are forward filled.</span>

<span class="sd">    :param df:          A time series</span>
<span class="sd">    :type  df:          pd.DataFrame</span>

<span class="sd">    :param n_std:       The number of standard deviations from the mean</span>
<span class="sd">    :type  n_std:       int</span>

<span class="sd">