makedist
              Create probability distribution object.
 pd = makedist (distname) creates a probability
 distribution object for the distribution specified in distname, using
 the default parameter values.
 pd = makedist (distname, Name, Value) also
 creates a probability distribution object with one or more distribution
 parameter values specified by Name-Value pair arguments.
 list = makedist  returns a cell array, list, containing a
 list of the probability distributions that makedist can create.
See also: fitdist
Source Code: makedist