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. 2013 Oct 23;8(10):e77671. doi: 10.1371/journal.pone.0077671

Figure 2. An example of the dynamic time-warping matching of two whistle profiles.

Figure 2

The left frame shows the original signals on arbitrary time and frequency axes. The right frame shows the red sample having undergone a dynamic time-warping transformation to produce the minimum least-squares distance from the blue sample. Note how the spacing of the points in the curve have been varied.