Mat_eff
A (nxp) matrix , where n was the number of groups in the original data file, and p the number of (binary) variables. This matrix contains the number of known individuals in each group and for each variable.
Mat_prop
A (nxp) matrix , where n was the number of groups in the original data file, and p the number of (binary) variables. This matrix contains the proportion of presence (i.e. of "1" values) in each group and for each variable.