You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: ECGModelErrorTimeBased.m
    path of file: ./repos/OSET/under-development
    
    the code of the file until where you have to start completion: function E = ECGModelErrorTimeBased(observations, params, time)
%
% A time-based version of ECGModelError() for generating a sum of Gaussian
% model.
%
% Open Source ECG Toolbox, version 3.14, February 2019
% Released under the GNU General Public License
% Copyright (C) 2019  Reza Sameni
% reza.sameni@gmail.com

% This program is free software; you can redistribute it and/or modify it
% under the terms of the GNU General Public License as published by the
% Free Software Foundation; either version 2 of the License, or (at your
% option) any later version.
% This program is distributed in the hope that it will be useful, but
% WITHOUT ANY WARRANTY; without even the implied warranty of

    
function E = ECGModelErrorTimeBased(observations, params, time)
%
% A time-based version of ECGModelError() for generating a sum of Gaussian
% model.
%
% Open Source ECG Toolbox, version 3.14, February 2019
% Released under the GNU General Public License
% Copyright (C) 2019  Reza Sameni
% reza.sameni@gmail.com

% This program is free software; you can redistribute it and/or modify it
% under the terms of the GNU General Public License as published by the
% Free Software Foundation; either version 2 of the License, or (at your
% option) any later version.
% This program is distributed in the hope that it will be useful, but
% WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
% Public License for more details.

L = (length(params)/3);

alphai = params(1:L);
bi = params(L+1:2*L);
tetai = params(2*L+1:3*L);

Z = zeros(size(time));
for j = 1:length(alphai)
    dtetai = time - tetai(j);
    Z = Z + alphai(j) .* exp(-dtetai .^2 ./ (2*bi(j) .^ 2));
end