[GAP Forum] Lists in GAP
Benjamin Sambale
bsambale at gmx.de
Wed Jul 1 12:59:54 BST 2009
Dear Neha,
maybe you have to initialize your list first. Just put a elems2:=[]; in
front of the loop and try.
Best wishes,
Benjamin
Neha Gupta schrieb:
> Dear Forum Member,
>
> I want to use arrays in GAP. But Im not able to find a way of
> declaring/defining one. The following is what I intend to do...
>
> I have defined elems1 as a List with 36 members. A tyical element of elems1
> looks like this :
> Tuple([ C2[1],Random(M)])
>
> Now I wish to define another List elems2 also with 36 members using elems1 :
>
> b:=Random([1..16]);;
> x:=elems1[b][2];;
> pik:=Random(M);;
>
> for j in [1..36] do
> if (j<> b) then
> elems2[j]:=elems1[j];;
> else
> elems2[j]:=Tuple([elems1[j][1],pik]);;
> fi;
> od;
>
> I get the following error :
>
> " Error, The list you are trying to assign to is immutable called from
> j <> b called from
> <function>( <arguments> ) called from read-eval-loop "
>
> Please help me defining a List/Array.
>
> Neha
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