-</span><span class='fl'>2</span>, to <span class='op'>=</span> <span class='fl'>2</span>, by <span class='op'>=</span> <span class='fl'>.1</span><span class='op'>)</span><span class='op'>)</span>
<span class='va'>nd.splines</span> <span class='op'>&lt;-</span> <span class='fu'><a href='https://rdrr.io/r/base/with.html'>with</a></span><span class='op'>(</span><span class='fu'><a href='https://rdrr.io/r/base/attributes.html'>attributes</a></span><span class='op'>(</span><span class='va'>time_splines</span><s