quasi
Posts:
11,916
Registered:
7/15/05


Re: Help with creating a function
Posted:
Nov 18, 2013 6:57 AM


quasi wrote: >Robert Crandal wrote: >> >>Suppose I have the following XY data set: >> >>X Y >>  >>0 1 >>1 1 >>2 2 >>3 3 >>. . >>. . >>N N >> >>Can this be represented with a math function? >> >>(Only consider positive integers >= 0) > >It's already a function since for each x in the domain, there >is a unique y. > >Presumably you want a "formula". > >The function f defined on the set of nonnegative integers >by the formula > > f(x) = ((x1)*(((2*x1)/abs(2*x1))+1)/2)+1 > >is not pretty but it works.
Here's a simple one based on the floor function.
f(x) = x + floor(1/(x+1))
quasi

