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[p, q] = get_products();
% quantity sum over a day
%plot(sum(q'));
train_data = q( 1:28, :);
real_data = q(29:42, :);
pred_methods = [
struct('name', 'mean', 'func', @mean_pred )
struct('name', 'regress', 'func', @regress_pred )
struct('name', 'quad', 'func', @quad_regress_pred )
struct('name', 'log reg.', 'func', @log_regress_pred )
struct('name', 'sevenday', 'func', @sevenday_pred )
struct('name', 'random', 'func', @rand_pred )
struct('name', 'regress2', 'func', @regress_frequency_removal )
];
num_methods = size(pred_methods, 1);
pred_list = {};
for i = 1:num_methods
pred_list{i} = pred_methods(i).func(p, train_data);
end
qerr = terr = zeros(1, num_methods);
err = zeros(num_methods, size(real_data,2));
for i = 1:num_methods
[qerr(i), terr(i), err(i, :)] = calc_error(pred_methods(i).name, real_data, pred_list{i});
end
opt_data = opt_pred(real_data, pred_list);
[qerr(end+1), terr(end+1), opt_err] = calc_error('optimize', real_data, opt_data);
bar(qerr);
bar(terr);
[min_err, err_idx] = min(err);
printf('global min. error: %d\n', sum(min_err));
printf('local min count:');
local_min_count=zeros(1, size(err, 1));
for i=1:size(err,1)
local_min_count(i) = sum(sum(err_idx == i));
printf(' %d', local_min_count(i));
end
printf('\n');
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