n class='op'>(</span><span class='fl'>.02</span>, <span class='fl'>.98</span><span class='op'>)</span><span class='op'>)</span><span class='op'>)</span>
<span class='va'>d</span><span class='op'>$</span><span class='va'>t1</span> <span class='op'>&lt;-</span> <span class='va'>time_splines</span><span class='op'>[</span>, <span class='fl'>1</span><span class='op'>]</span>
<span class='va'>d</span><span class='op'>$</span><span class='va'>t2</span> <span class='op'>&lt;-</span> <span class='va'>time_splines</