random0.m

图像分割算法的Matlab源程序

function ran = random0(n,m)
%RANDOM0 Generate uniform random numbers in [0,1)
% Function RANDOM0 generates an array of uniform 
% random numbers in the range [0,1).  The usage
% is:
% 
% random0(n)    -- Generate an n x n array
% random0(n,m)  -- Generate an n x m array
 
% Define variables:
%   ii       -- Index variable
%   ISEED    -- Random number seed (global)
%   jj       -- Index variable
%   m        -- Number of columns
%   msg      -- Error message
%   n        -- Number of rows
%   ran      -- Output array

%  Record of revisions:
%      Date       Programmer          Description of change
%      ====       ==========          =====================
%    12/16/98    S. J. Chapman        Original code

% Declare globl values
global ISEED            % Seed for random number generator


% Check for a legal number of input arguments.
msg = nargchk(1,2,nargin);
error(msg);

% If the m argument is missing, set it to n.
if nargin < 2
   m = n;
end

% Initialize the output array
ran = zeros(n,m);

% Now calculate random values
for ii = 1:n
   for jj = 1:m
      ISEED = mod(8121*ISEED + 28411, 134456 ); 
      ran(ii,jj) = ISEED / 134456;
   end
end