function?varargout?=?randraw（distribName?distribParams?varargin）
%
%???EFFICIENT?RANDOM?VARIATES?GENERATOR
%?
%?See?alphabetical?list?of?the?supported?distributions?below?（over?50?distributions）
%?
%?1）??randraw?
%???????????presents?general?help.
%?2）??randraw（?distribName?）?
%???????????presents?help?for?the?specific?distribution?defined?
%???????????by?usage?string?distribName?（see?table?below）.
%?3）??Y?=?randraw（?distribName?distribParams?sampleSize?）;
%???????????returns?array?Y?of?size?=?sampleSize?of?random?variates?from?distribName??
%???????????distribution?with?parameters?distribParams
%
%???????????????ALPHABETICAL?LIST?OF?THE?SUPPORTED?DISTRIBUTIONS:
%??____________________________________________________________________
%?|??????DISTRIBUTION?NAME????????????????????|???USAGE?STRING?????????|
%?|___________________________________________|________________________|
%?|????????Alpha??????????????????????????????|????‘alpha‘?????????????|
%?|????????Ang