Thanks for your help. I am a maxima-autodidact and I am using Maxima a
lot in my daily work as a teacher. I looked for a way to create
variables (respectively names of variables) "dynamically" and learned
about concat in the reference guide and about ''(...) by trial and
error. I did not know of a[i] so far.
Christian
Am 25.09.2013 13:16, schrieb Stavros Macrakis:
>
> ''(...) Is *read-time* substitution, a very special-purpose
> mechanism. Try ev(...).
>
> But why are you creating variables in this strange way in the first
> place? Why not use a[i]?
>
> Also, how did you learn about ''(...) and concat? I wonder if there's
> some documentation or tutorial that's miseducating people... we see
> this problem often.
>
> -s
>
> On Sep 25, 2013 5:21 AM, "Christian Stengg" <christian.stengg at gmx.at
> <mailto:christian.stengg at gmx.at>> wrote:
>
> Hello,
>
> why do I get the output bj in the loop?
>
> Thanks for any help,
> Christian
>
>
> i:1;
> concat(a,i)::10*i;
> ''(concat(a,i));
> print(''(concat(a,i)));
>
> for j:1 thru 2 do (
> concat(b,j)::10*j,
> print(''(concat(b,j)))
> );
>
> b1;
> b2;
>
>
> (%o1) 1
> (%o2) 10
> (%o3) 10
> 10
> (%o4) 10
> bj
> bj
> (%o5) done
> (%o6) 10
> (%o7) 20
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