But === Selectively extract modes from modal data structures. Modes are selected based on a modal parameter value criterion greater than a certain threshold, and then are concatenated into a single final data structure. A summary table on the accumulations of the effective unit modal masses or the generalized masses of the selected modes can also be printed in file MESSAGE. Produces a mode_meca or mode_gene data structure depending on the type of input modes. .. _FinBut: