[LON-CAPA-users] maxima variable %

[Peter Dencker]

Hi.

The evaluation of
    1+2;storeA:%;1-2;storeB:%;[storeA,storeB];
with maxima (running in a shell on the LON-CAPA server)
gives, as expected, [3,-1]

But using
    cas( 'maxima', "1+2;storeA:%;1-2;storeB:%;[storeA,storeB];" );
in LON-CAPA does not work properly.
(I would like to use such structures in a library project.)

In principle the  maxima variable % works.

    my @CHECK_IN = qw(
       1+2;
       1+2;%;
       1+2;%;%;
       1+2;store:%;%;
       1+2;store:%;store;
    );
    my @CHECK_OUT = map { cas( 'maxima', $_ ) } @CHECK_IN;

Alle five entries of  @CHECK_OUT  should be 3. The first three examples
work properly in LON-CAPA, but the other two don't; both evaluations
seem to yield random integer numbers.

I have a workaround, but using % would be the much better solution.
Any idea?

- Peter


<problem>
<script type="loncapa/perl">

    my @CHECK_IN = qw(
       1+2;
       1+2;%;
       1+2;%;%;
       1+2;store:%;%;
       1+2;store:%;store;
    );
    my @CHECK_OUT = map { cas( 'maxima', $_ ) } @CHECK_IN;
    our $out_str = join '<br />', @CHECK_OUT;
    $out_str .= '<br />'
        . cas( 'maxima', "1+2;storeA:%;1-2;storeB:%;[storeA,storeB];" );

</script>

$out_str

<customresponse id="0r0">
  <answer type="loncapa/perl">
    return 'SUBMITTED';
  </answer>
</customresponse>
</problem>


-- 
Dr. Peter Dencker
    wissenschaftl. Mitarbeiter

UNIVERSITÄT ZU LÜBECK
    INSTITUT FÜR MATHEMATIK

    Ratzeburger Allee 160
    23562 Lübeck

    Tel +49 451 500 4254
    Fax +49 451 500 3373
    dencker at math.uni-luebeck.de

    www.math.uni-luebeck.de