This is the code to load the MovieLens dataset into Matlab and to do some plotting:
The simpleset way of loading the dataset is via ImportWizard
All I want to do is to plot a graph where x-axis is movie id and y-axis is popularity (number of ratings).
% column of movie_ids
m = ratings(:,3);
% 1:3592 = movie_ids
[freq,xout] = hist(m,(1:3592));
% plotting sorted by popularity
plot( sort(freq));
The result is a nice power law (long tailed) distribution.