Scatterplot from .mat file data with loop

How do I make a scatter plot from a .mat file that looks like this?

I have a .mat file with data from 15 petri dish colonies. Each column has 10 days of population data. There are 15 rows. I need each dish to plot its points vertically and then draw a line with thickness 3 that is the average of the days. I have been told to use a loop but I'm completely stuck on even starting.

Answer 1

[Star Strider]

Try something like this:

Colonies = rand(15,10);                         %Days = 15, Colonies = 10
MeanColonies = mean(Colonies,2);
Days = 1:15;

figure
plot(Days, Colonies, 'p')
hold on
plot(Days, MeanColonies, 'LineWidth',2)
hold off

.

Answer 2

[KSSV]

A = rand(15,8) ;   % random data for demo 
[m,n] = size(A) ; 
% Get mean 
M = mean(A) ; 

X = repmat(1:n,m,1) ; 
scatter(X(:),A(:),[],A(:))
hold on
plot(1:n,M,'k')