dd><p>A character value equal to "mfd" or "raw".
If "mfd", the smoothed functional data are plotted, if "raw",
the original discrete data are plotted.</p></dd>


<dt>y_lim_equal</dt>
<dd><p>A logical value. If <code>TRUE</code>, the limits of the y-axis
are the same for all functional variables.
If <code>FALSE</code>, limits are different for each variable.
Default value is <code>FALSE</code>.</p></dd>


<dt>...</dt>
<dd><p>See <code>ggplot2::<a href="https://ggplot2.tidyverse.org/reference/geom_path.html" 