How about storing the answers in a table or Vector?

epostma — Mon, 12 Jul 2010 22:44:12 Z

Hi afeddersen,

Sorry - I seem to have a habit of answering direct questions with "here is something different you could do that might accomplish your goals in a better manner", and I'm afraid this is going to be such an answer.

The label feature in Maple is great, but it mostly works with direct user interaction: there's no easy access to programmatically retrieve the value of label (x.y) for example, if x and y are integers; instead you have to enter these numbers manually. Loops, of course, are very much programmatic constructs, and thus these two don't mesh very well.

One option would be to just store whatever value is printed out in a ?table or an ?rtable (such as a ?Vector). So if you have a loop that looks like this:

running_total := 0;
for i to 25 do
  running_total := running_total + i:
  i^2 - running_total;
end do;

to print the numbers i*(i-1)/2, you could instead decide to store these in a Vector:

results := Vector(25);
running_total := 0;
 for i to 25 do
   running_total := running_total + i:
   results[i] := i^2 - running_total;
 end do;

Now you can access the ith value as results[i] - with the added advantage over labels that it also works programmatically, not just when you type it directly. Does that help for what you're trying to do?

Erik Postma
Maplesoft.

I am not able to understand this concept

elango8 — Sat, 26 Mar 2011 02:09:04 Z

I am not able to understand this concept but i guess i might have confused you with my wordings in the problem.....i simply want a label ,in the sense...A= ,B=,C=...for the list of expressions being generated in the loop..i do not want to refer to them in any other place

MaplePrimes - answers and comments on Question, How to create labels for each result of commands embedded in a do-loop?

How about storing the answers in a table or Vector?

I am not able to understand this concept