Hello!

I need to obtain all possible combinations with replacement when order is
not important.
E.g. I have a population x{1,2,3}.
So I can get (choose(3+3-1,3)=) 10 combinations from this population with
'size=3'.
How can I get a list of all that combinations?

I have tried 'expand.grid()' and managed to get only samples where order is
important.
'combn()' gave me samples without replacement.

Best regards,
Konstantin Tretyakov.

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