Define cluster sample that we want to use to measure splashback

[chihway]

Perhaps try to match as much as possible to the fiducial sample used in Chang et al.?

[ajamsellem]

Using the same constraints on redshift and richness as in the fiducial example, we get these plots. The WaZP plot doesn't give us much to compare to because it is in terms of Number of Galaxies (although I could maybe convert those either now or at some point if we rely on the fit relating richness and ngal – see issue 1.) The RM one looks similar to that presented in Chang et al. in Fig. 1, but it's hard to directly compare since Fig. 1 does not have a scale calibrating for color.