To fix this, surround the assignments in the inner loop with
parenthesis:
(C1) FOR i:1 THRU 2 DO
FOR j:1 THRU 2 DO (
a[i,j] : i + j,
b[i,j] : i - j);
(D1) DONE
(C2) [a[1,1],a[1,2],a[2,1],a[2,2]];
(D2) [2, 3, 3, 4]
(C3) [b[1,1],b[1,2],b[2,1],b[2,2]];
(D3) [0, - 1, 1, 0]
(C4)
Clear?
Barton
"å×ÇÅÎÉÊ óÁ×ÅÎËÏ×" <savenkov@keldysh.ru>
Sent by: maxima-admin@math.utexas.edu
11/19/2003 05:58 AM
Please respond to savenkov
To: <maxima@www.ma.utexas.edu>
cc:
Subject: [Maxima] Nested for-statements in Maxima
Hello!
I'm new to Maxima, and i have a problem. I suppose the solution is simple,
but i didn't find any
in the Maxima-related docs.
I need to do something like this (in Fortran):
DO i=1,n
DO J=1,k
! some assigments to the array elements here
a(i,j) = some_function_of_ij
b(i,j) = another_function_of_ij
ENDDO
ENDDO
I've tried the following solution:
FOR i:1 THRU n DO
FOR j:1 THRU k DO
a[i,j]:some_function_of_ij,
b[i,j]:another__function_of_ij$
but it doesn't work. Only the first assigment (a[i,j]:...) is perfomed in
a
right way.
I think i use nested for-statements in a wrong way.
If i make only one assigment in the loop body, i.e.
FOR i:1 THRU n DO
FOR j:1 THRU k DO
a[i,j]:some_function_of_ij$
everything is ok.
So, what's wrong and how to do it correctly?
Just point me to the related docs or to the simple example.
Thanks a lot.
Best regards,
Gene
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