‘... but evry time it replace the first graph ...’
It does not replace them. It creates a second figure and that figure is on top of the first figure. It is necessary to select the individual figures to see both of them.
Perhaps creating them as subplots instead would do what you want —
function compare_cases(country1,country2,names,days,avg_days,dailycases)
Index1 = strcmpi(names,country1);
% [row,col] = find(not(doublefun('isempty',IndexC)))
dailydata1= dailycases(Index1,:);
daily_cases1 = movmean(dailydata1, avg_days);
figure
subplot(2,1,1)
title('country1')
bar(days(1:end-1),daily_cases1);
% bar(days(1:end-1),dailydata);
Index2 = strcmpi(names,country2);
% [row,col] = find(not(doublefun('isempty',IndexC)))
dailydata2= dailycases(Index1,:);
daily_cases2 = movmean(dailydata2, avg_days);
subplot(2,1,2)
title('country2')
bar(days(1:end-1),daily_cases2);
end
.
