Create Random or Deterministic Self-Similar signal
Frac = MakeFractal(n,base,type,prob)
signal length
base of digits in expansion
string 'rand' or 'detrministic'
vector of base numbers with sum = 1
Self-Similar signal
To get (a discrete approximation to) a Cantor Set, use base=3, type ='deterministic', prob = [.5 0 .5]
To get the random self-similar signal in Arneodo & Co. use base=4, type = 'random', prob = [.69, -.46, .46, .31]