[R] calculating an N50

Jeremy Leipzig jeremy at zigster.com
Tue Nov 25 18:44:54 CET 2008

> Given a set of integers of different values how do I calculate the
> minimum number of the largest of integers that are required, when
> summed, to equal 50% of the total sum of the the set?
Actually I need the value of the smallest member such that the
sum of all members equal or greater to that is 50% of the total sum of the set

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