findFileSeries

function [returnFileGroup] = findFileSeries(filePath, allowskiplength, inclSmallerNumbers)

% input is the filepath of one file in a series of files that have
% some numeric indexing in their filenames

% allowskiplength allows skipping of numbers in the index (default = 0 =>
% no skipping allowed, only an uninterrupted series of indixed filenames will be returned)

% inclSmallerNumbers: if false, we only look for filenames containing higher
% indices, if true, we also accept filenames with smaller indices than in filePath; default
% = false