Ramaswamy, summing seven uniform random numbers doesn't give a uniform result. Even the sum of two random numbers is not uniform. Consider rolling two dice. 2 occurs only 1 out of 36 times, while 7 occurs 6 out of 36 times.
Dave On Sep 8, 2:34 pm, Ramaswamy R <ramaswam...@gmail.com> wrote: > Generate the random number 7 times. Sum them all and divide by 5. > Theoritically it should be evenly distributed over 1-7. But owing to random > number generators characteristics the sum of rand(5) called 7 times may not > be perfectly evenly distributed over 1-7. > A nice discussion on some neat options is available here > -http://stackoverflow.com/questions/137783/given-a-function-which-prod... > > Rejection technique is pretty standard for this and yet simple. > > On Mon, Sep 7, 2009 at 8:56 AM, ankur aggarwal > <ankur.mast....@gmail.com>wrote: > > > Given a random number generator that generates numbers in the range 1 to > > 5, how can u create a random number generator to generate numbers in the > > range 1 to 7. (remember that the generated random numbers should follow a > > uniform distribution in the corresponding range) > > -- > Yesterday is History. > Tomorrow is a Mystery. > Today is a Gift! That is why it is called the Present :). > > http://sites.google.com/site/ramaswamyr --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Algorithm Geeks" group. To post to this group, send email to algogeeks@googlegroups.com To unsubscribe from this group, send email to algogeeks+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/algogeeks -~----------~----~----~----~------~----~------~--~---
