re are no additional knots, the boundary
locations are not used.  If there are one or more additional knots, the
boundary knots should be at or beyond the minimum and maximum values of the
log times.  In <code><a href="flexsurvspline.html">flexsurvspline</a></code> these are exactly at the
minimum and maximum values.</p>
<p>This may in principle be supplied as a matrix, in the same way as for
<code>gamma</code>, but in most applications the knots will be fixed.</p></dd>


<dt id="arg-scale">scale<a class="a