Sample random unitary invariant ensembles
samplespectra("Quartic",n,m)
samplespectra("EightUnscaled",n,m)
samplespectra("CoshUnscaled",n,m)
Sample n x n high order decay ensemble w(x) = exp(-(x.^4/20 -4/15x.^3 + x.^2/5+8/5x)) eigenvalues, m times
samplespectra("HODecay",n,m)