 Usage:  {y,mu} = genmultlo(x,b)  
 
 Input:

  x                      n x r matrix, design. 
                         
  b                      r x m matrix (m>1, first column equals zero) 
                         or r/m x 1 vector 
                         or a list containing a p x m matrix (m>1, 
                         first column equals zero) and a q x 1 
                         vector and r=p+(q*m). 
                         
 Output:

  y                      n x 1 vector, multinomial in 0 ... (m-1). 
                         
  mu                     n x m vector, response probabilities 
                         P(y=j), j=1,...,m. 
                         
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(C) MD*TECH Method and Data Technologies, 17.8.2000
