/span> <span class='fl'>TRUE</span>,
  <span class='kw'>y_pretty_n</span> <span class='kw'>=</span> <span class='fl'>5</span>,
  <span class='kw'>y_title</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>y_title_wrap</span> <span class='kw'>=</span> <span class='fl'>50</span>,
  <span class='kw'>y_trans</span> <span class='kw'>=</span> <span class='st'>"identity"</span>,
  <span class='kw'>y_zero</span> <span class='kw'>=</span> <span class='fl'>TRUE</span>,
  <span class='kw