trimzeros.m

function [ varargout ] = trimzeros( varargin )
%TRIMZEROS Removes trailing "zero" datapoints from the input vectors
%   At the end of the `emg` array are expected to be a series of 0.0 values which
%   cause problems for data analysis. This function will remove those zeros from the
%   input columns. Call this function using either:
%   >> [ t, emg ] = trimzeros(t, emg);
%   or:
%   >> [ t, emg, force ] = trimzeros(t, emg, force);

	if (nargin < 2) || (nargin > 3)
		error('Please call this function with 2 or 3 arguments in the order: t, emg, force!');
	end

	if nargin ~= nargout
		error('Please call this function with the same number of outputs as inputs!');
	end

	% find the first ending 0
	i = length(varargin{2});
	for k = i:-1:1
		if varargin{2}(k) ~= 0
			i = k;
			break;
		end
	end

	% found the first starting 0, it's at index: i + 1

	% trim the arrays!
	for k = 1:nargout
		varargout{k} = varargin{k}(1:i);
	end
end