Statistic bar chart and lining the points of bar charts

Hi Dears,

How can I have a line go through all the bar in the graph?

And how can I have the value of n_random label on each bar?

Please help me. I really appreciate that

clc;
close all;
clear all;
n = 50;
p = 0.2;
n_random = randi(15,1,n);
for i = 1:1:numel(n_random);
    y= poisspdf(n_random(i),p);
    figure (1);
    yyaxis left;
    bar(i,y);    
    hold on;
    yb = cat(1, y.YData);
    xb = bsxfun(@plus, h(1).XData, [h.XOffset]');
    hold on;
    padval = 1;
    htxt = text(xb(:),yb(:)-padval, cellstr(num2str(yb(:))), ...
    'rotation', 90, 'horiz', 'right');
    set(htxt(1:3:end), 'color', 'w');
end

Dot indexing is not supported for variables of this type.

grid on;
sum1 = sum(y{i});
mean1 = mean(y{i});
fprintf('Mean of D is: %d',mean1);