Figure 1.

The Dynamic Time Warping (DTW) algorithm aligns two gait cycles from a subject with mild disability (EDSS = 2.5). The asterisks show the same peak before and after phase correction. Two regions with warp insertions have been circled; warps may be identified by the horizontal segments indicating repeated data points. The DTW Distance is the Euclidean distance between the cycles on the right, and the warping length is the number of warps inserted.