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: f_ploterpserpviewer.m
    path of file: ./repos/erplab/studio_functions/Functions/EStudio/ERP Tab/ERP wave viewer
    
    the code of the file until where you have to start completion: % PURPOSE:  subroutine for pop_plotERPwaveiwer.m
%           plot ERP waveforms
%

% FORMAT:
%

% f_ploterpserpviewer(ALLERP,qCURRENTPLOT, qPLOTORG,qbinArray,qchanArray,qGridposArray,plotBox,qBlc,qLineColorspec,qLineStylespec,qLineMarkerspec,qLineWidthspec,...
%     qLegendName,qLegendFont,qLegendFontsize,qCBELabels,qLabelfont,qLabelfontsize,qPolarityWave,qSEM,qTransparency,qGridspace,qtimeRange,qXticks,qXticklabel,...
%     qXlabelfont,qXlabelfontsize,qXlabelcolor,qMinorTicksX,qXunits,qYScales,qYticks,qYticklabel,qYlabelfont,qYlabelfontsize,qYlabelcolor,qYunits,qMinorTicksY,...
%     qplotArrayStr,qERPArray,qlegcolor,qlegcolumns,qFigureName,qFigbgColor,qLabelcolor)

% Inputs:
%
%ALLERP           -ALLERPset
%qCURRENTPLOT     -index of current ERPset/bin/channel(e.g., 1)
%qPLOTORG         -plot organization including three elements (the defau
    
function is part of EStudio Toolbox ***
% Author: Guanghui Zhang & Steven Luck
% Center for Mind and Brain
% University of California, Davis,
% Davis, CA
% 2022 & 2023


function f_ploterpserpviewer(ALLERP,qCURRENTPLOT, qPLOTORG,qbinArray,qchanArray,qGridposArray,plotBox,qBlc,qLineColorspec,qLineStylespec,qLineMarkerspec,qLineWidthspec,...
    qLegendName,qLegendFont,qLegendFontsize,qCBELabels,qLabelfont,qLabelfontsize,qPolarityWave,qSEM,qTransparency,qGridspace,qtimeRange,qXticks,qXticklabel,...
    qXlabelfont,qXlabelfontsize,qXlabelcolor,qMinorTicksX,qXunits,qYScales,qYticks,qYticklabel,qYlabelfont,qYlabelfontsize,qYlabelcolor,qYunits,qMinorTicksY,...
    qplotArrayStr,qERPArray,qlegcolor,qlegcolumns,qFigureName,qFigbgColor,qLabelcolor,qYtickdecimal,qXtickdecimal,qXdisFlag,qFigOutpos)

if nargin<1
    help f_ploterpserpviewer;
    return
end

if isempty(ALLERP)
    msgboxText =  'No ALLERP was found!';
    title_msg  = 'EStudio: f_ploterpserpviewer() error:';
    errorfound(msgboxText, title_msg);
    return;
end


if nargin<40 || isempty(qERPArray)
    qERPArray = [1:length(ALLERP)];
end

if max(qERPArray)>length(ALLERP)
    qERPArray=length(ALLERP);
end