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Re: What is f[1]? Advanced question
Posted:
Jun 26, 2013 12:59 AM


It is possibly a previously declared "Array" with the name "x", and the three lines are assigning values to the elements of the array. Check for Array in the Help. Tomas
> From: Anthony.J.Mannucci@jpl.nasa.gov > Subject: What is f[1]? Advanced question > To: mathgroup@smc.vnet.net > Date: Tue, 25 Jun 2013 21:14:08 0400 > > 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 > > the answer is just what I have written above. Mathematica knows about x[1], x[2], etc. How does Mathematica know about the "elements" of x? > > In some other sense, I could have written: > y1 = 0.1 > y2 = 0.2 > y3 = 0.3 > > But > ?y > > obviously gives a different result (just returns y). > > Thank you. >



