function fig_timing_measured()
%FIG_TIMING_MEASURED  实测一局：累计虚拟时间按动作类型的堆叠构成。

    S = fig_style();
    D = load_data(S, 'timing_measured');
    fig = figure('Color', 'w', 'Visible', 'off');
    ax = axes(fig);

    seq = D.seq(:);
    bands = [D.cum(:, 1), diff(D.cum, 1, 2)];    % area 对矩阵按列堆叠，这里给每层厚度
    h = area(ax, seq, bands, 'FaceAlpha', 1);
    xlim(ax, [seq(1), seq(end)]);
    xlabel(ax, D.xlabel);
    ylabel(ax, D.ylabel);
    legend(ax, h, D.legend, 'Location', 'northwest');
    fig_save(fig, S, 'timing-measured-q3-10-sources.png');
end