>,</span>
<span>  x_axis_label <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  y_axis_label <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  plot_title <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  low_cutoff <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  high_cutoff <span class="op">=</span> <span class="cn">NULL</span>,</span>
<span>  cutoff_line_width <span class="op">=</span> <span class="cn">NULL</span>,</span