an>, <span class='no'>data</span>, <span class='kw'>knots</span> <span class='kw'>=</span> <span class='kw'>NULL</span>,
  <span class='kw'>df</span> <span class='kw'>=</span> <span class='kw'>NULL</span>, <span class='kw'>degree</span> <span class='kw'>=</span> <span class='fl'>3</span>, <span class='kw'>intercept</span> <span class='kw'>=</span> <span class='fl'>FALSE</span>, <span class='kw'>nGrid</span> <span class='kw'>=</span> <span class='fl'>7</span>,
  <span class='kw'>gridPoints</span> <span class