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I need to represent a non linear function as an expression by Postfix Notation in R language, but I do not know how to do it? is any body can help me.

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    Produce a reproducible example http://stackoverflow.com/questions/5963269/how-to-make-a-great-r-reproducible-example – Agaz Wani Apr 26 '15 at 07:17
  • @ Aaghaz Hussain . thank you for your answer. I can not understand completely. Is it possible to add some example , for example a simple instance like log(1+2*x1/(1+3*x2)). thanks in advance – Mohadese Soleimanpoor Apr 26 '15 at 11:43

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