What I understand from your question is that you need to plot histograms as points inside a plot.
You can do that by setting position of histogram plot to your desired location. To calculate the desired location you need postion of parent plot and its handle which can be easily derived from gcf and gca as shown.
% Number of plots you need with respect to X Axis
% Number of types of distortions
numX = 5;
% Dummy plot to hold other plots
x = 0:numX;
y = zeros(numX+1);
plot(x, y, 'k');
% Handle to current plots and axes
fig = gcf;
pos = get(gca, 'Position');
% Set X and Y labels to plots
set(gca, 'XTick',0.5:numX-0.5, 'XTickLabel', {'Jp2k' 'JPEG' 'WN'})
set(gca, 'Ylim', [0 120]);
for i = 0:numX-1
for dmos = (4).*rand(1,10)
x = 10:100;
y = -log(x);
% Set position and size of graph
% Position - [left bottom width height]
% modify dmos values in bottom and height to desired position
h = axes('Parent', fig, ...
'Position', [pos(1)+pos(3)*i/numX pos(2)+dmos*pos(4)/6 pos(3)/numX pos(4)/6]);
histogram(h, y);
set(h, 'XTick', [], 'YTick', []);
end
end
