rally I recommend caution when using derivative estimation</span>
0097 <span class="comment">%  (and especially higher order derivative estimation) -- can you</span>
0098 <span class="comment">%  really estimate derivatives from noisy data? Any derivative</span>
0099 <span class="comment">%  estimate is inherently more dependent on an assumed smoothness</span>
0100 <span class="comment">%  (expressed through the bandwidth) than the data. Warnings aside...</span>
0101 <span class="comment">%</span>
010