
Re: What is f[1]? Advanced question
Posted:
Jun 28, 2013 3:49 AM


On Tue, 25 Jun 2013 19:14:08 0600, amannucci <Anthony.J.Mannucci@jpl.nasa.gov> wrote:
> I have found a Mathematica program with the following construct: > x[1]=0.1 > x[2]=0.2 > x[3]=0.3 > or > Do[x[i]=i/10.,{i,1,3}] > x is not a function. It is not a list. What is it? If I query x thus: > ?x
x most certainly *is* a function. Its a function whose domain contains just the three numbers 1, 2, and 3.
And it is *not* an array. Mathematica has lists, which it uses as arrays on occasion. An array, y, is indexed with double brackets: a[[1]], a[[2]], etc.
Louis A. Talman Department of Mathematical and Computer Sciences Metropolitan State University of Denver
<http://rowdy.msudenver.edu/~talmanl> .

