e problem is actually sparser than you think!
% note the increase in the # of significant posterior modes as a result.
%
% o) try varying the aspect ratio of design matrix A by changing m (# of obs)
% and note how the # of significant posterior modes changes with m
%
% o) A, x, y and noise can be sampled as Uniform, Gaussian or even Binary
% see the commented-out portions in the code below, try changing these.
%
% o) you can explore the prior for all k (i.e., all 2^n sparsities) thus
% not commiti