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: errorband2.m
    path of file: ./repos/mpsim/lib/plot
    
    the code of the file until where you have to start completion: function [h_line, h_band] = errorband2 (x, y, e, ...
line_style, band_color, band_transparency, single_point_dy, edge_color)

    
function [h_line, h_band] = errorband2 (x, y, e, ...
line_style, band_color, band_transparency, single_point_dy, edge_color)
%ERRORBAND2  Filled-in error bands, vertical variant.
% 
%   See also: ERRORBAR

    myassert(numel(x), numel(y));
    if ~issorted(x),  [x, ind] = sort(x);  y = y(ind);  e = e(ind,:);  end