function showLevelConfusionMatrix(decided_symbols,ref_symbols,options)
arguments
    decided_symbols
    ref_symbols
    options.M = NaN
    options.fignum (1,1) double = NaN % Default to NaN if not provided
    options.displayname (1,:) char = '' % Default to an empty string if not provided
end

% Determine the figure number to use or create a new figure
if isnan(options.fignum)
    fig = figure; % Create a new figure and get its handle
else
    fig = figure(options.fignum); % Use the specified figure number
end

if length(unique(decided_symbols.signal))>20
    assert(~isnan(options.M),'Provide either decided symbol sequence or modulation order M (PAM-4 -> M=4)');
    decided_symbols = PAMmapper(options.M,0).quantize(decided_symbols);
end

%%% Confusion Matrix
cm = confusionchart(ref_symbols.signal,decided_symbols.signal,'RowSummary','row-normalized','ColumnSummary','column-normalized','Title','Confusion Matrix','XLabel','Decisions','YLabel','Transmitted');


end