Figure 3.

Analysis of representative time traces from cell-tracking experiments. (A) Time traces of the x (gray line) and y coordinates (black line) of the position of the cell represented in Fig. S3 are shown. Shaded gray regions correspond to regions where the algorithm detected changes of slope. The dashed line corresponds to the piecewise reconstructed trace of the trajectory along the y-direction that has been shifted upwards for clarity. (B) A histogram shows the duration of the detected segments, divided according to the direction of the y-component of the velocity along (light gray shaded area) or against (white area) the shear flow. (C) A histogram shows the y-component of the velocity of the detected segments. In both panels, the gray bars correspond to experimental data, and the black lines are the resulting distributions of time and velocity after applying the algorithm to the simulated data.