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. Author manuscript; available in PMC: 2023 May 31.
Published in final edited form as: Biol Rhythm Res. 2022 May 31;53(8):1299–1319. doi: 10.1080/09291016.2021.1929673

Figure 2.

Figure 2.

Example of a warping function for one subject mapping chronological time to registered time. The left panel demonstrates where certain points throughout his chronological day fall on his registered timeline. The right panel displays the corresponding 2-knot piecewise linear warping function.