α Cen B: correlation plots between and the activity indicators (A, γ, and FWHM_SN); the contrast parameter A is shown after having been multiplied by a factor ten. Top left panel: the entire data are taken into account as a result of the oc method. Other panels: correlations are shown for each segment found by the bp method. A nonparametric local regression for each pair of considered variables (continuous red line) and its barycenter (i.e., the median, red dot) are also shown.