Dear All,
   
  I wonder if there is any R function to generate a sequence of vectors from existing ones. For example:
  x 1<- c(1,2,3)
  x2 <- c(4,5)
  x3 <- c(6,7,8)
   
  The desired output is a list of all 3*2*3 = 18 possible combinations of elements of x1,x2 and x3. One element for example is (1,4,6).
   
  Many thanks in advance,
   
  Bernard
   
   

             
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