Function g = findconsec(b)
finds indices in one-dimensional matrix of
booleans, b, and returns the found indices
in groups, so that the indices in each group
form consecutive numbers: i(k) - i(k-1) == 1.
Output argument g is always a cell array.
E.g. findconsec([1 0 1 1 1 0 0 1 1] == 1)
returns: { [1], [3, 4, 5], [8, 9] }.
(c) 2026 fabien van mook
2026.08.20 release of this file within package "fvm-miscellaneous" under GNU GPLv3+