It's not clear exactly what you mean by "depicting the comparison". Should it be two histograms per table column, one histogram for the old table and one for the new? Or maybe one histogram per column, showing the difference between old and new?
In any case, here is some code that can maybe serve as a starting point, which you can adapt as needed:
% creating some random tables first:
data_old = num2cell(randn(644,4),1);
t_old = table(data_old{:});
data_new = num2cell(randn(644,4),1);
t_new = table(data_new{:});
% (1) two separate histograms for each column of the tables:
figure();
for ii = 1:4
subplot(2,2,ii);
histogram(t_old{:,ii});
hold on
histogram(t_new{:,ii});
end
% (2) one histogram per column, showing the (absolute) differences:
figure();
for ii = 1:4
subplot(2,2,ii);
histogram(abs(t_old{:,ii}-t_new{:,ii}));
end
